--- title: Mimecast Advanced Email Security Reviews meta_title: 'Mimecast Advanced Email Security Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter 361 reviews by the users' company size, role or industry to find out how Mimecast Advanced Email Security works for a business like yours. aggregate_rating: rating_value: 4.4 review_count: 361 scale: '5' date_modified: '2026-09-17' parent_category: name: Email Security url: https://www.g2.com/categories/email-security --- # Mimecast Advanced Email Security Reviews **Vendor:** Mimecast **Category:** [Cloud Email Security Solutions](https://www.g2.com/categories/cloud-email-security) **Average Rating:** 4.4/5.0 **Total Reviews:** 361 **AI Enabled:** This product embeds AI to enhance or extend its core functionality. ## About Mimecast Advanced Email Security Email Security, Cloud Integrated (CI) protects organizations against all forms of email-based attacks, from phishing and credential theft to ransomware and zero-day threats. This solution deploys behind M365 to collect emails after they have passed through Microsoft security, reinspect them, and take action as needed. With a setup time of just four minutes and out-of-the-box settings designed to optimize security immediately, Email Security CI delivers best-in-class efficacy in the simplest way possible. Customers get the full power of Mimecast’s AI-powered detection and threat intelligence in a solution built for the reality of navigating today’s hostile threat landscape with limited time and resources. Email Security CI also offers a fully integrated Awareness Training solution to help organizations easily and effectively reduce the risk of human error. ## Mimecast Advanced Email Security Pros & Cons Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews. **What users like:** - Users value the **advanced AI-driven threat protection** of Mimecast, significantly enhancing email security and user awareness. (49 reviews) - Users find Mimecast **exceptionally easy to implement and manage** , appreciating its seamless integration and reliability for email security. (44 reviews) - Users commend Mimecast for its **robust email security** , effectively preventing spoofing and protecting against dangerous attachments. (34 reviews) - Users praise the **powerful security features** of Mimecast Advanced Email Security, enhancing protection and ease of use. (26 reviews) - Users appreciate the **spam blocking capability** of Mimecast, effectively preventing breaches and ensuring email security. (25 reviews) - Users appreciate the **excellent customer support** from Mimecast, highlighting insightful responses and effective assistance from the team. (23 reviews) - Phishing Protection (23 reviews) - Protection (19 reviews) - Spam Filtering (17 reviews) - Integrations (16 reviews) **What users dislike:** - Users note the **complexity** of Mimecast's interface, making it challenging for new administrators to fully utilize. (21 reviews) - Users face **email filtering issues** with Mimecast, struggling to locate emails and manage extensive policies effectively. (17 reviews) - Users often face **email policy configuration issues** , leading to time-consuming adjustments and frustrations with usability. (16 reviews) - Users struggle with **configuration difficulties** , as the setup is complex and requires significant fine-tuning and adjustment. (15 reviews) - Users find the **false positives** in Mimecast frustrating, as they can delay important communications and require manual intervention. (15 reviews) - Users report **ineffective detection** of legitimate emails, leading to disruptions and time-consuming manual interventions. (15 reviews) - Poor Customer Support (14 reviews) - Users experience **poor detection** of legitimate emails, causing delays and disruptions in receiving important messages. (14 reviews) - Users find the **administration UI challenging** , making navigation and configuration time-consuming and complex for beginners. (13 reviews) - Difficult Setup (11 reviews) ## Mimecast Advanced Email Security Reviews ### 1. Excellent Protection Against Email Threats **Rating:** 4.0/5.0 stars **Reviewed by:** Vashcini J. | Technical Presales Engineer, Enterprise (> 1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** July 27, 2026 **What do you like best about Mimecast Advanced Email Security?** 1. Mimecast effectively blocks phishing, malware, ransomware, and BEC attacks before they reach user inboxes, improving overall email security. 2. The AI-driven threat intelligence helps identify suspicious emails, malicious URLs, and impersonation attempts with high accuracy. 3.The UI/UX is simple and intuitive, making it easy to monitor threats, manage policies, and review security incidents. 4. The seamless integration with Microsoft 365 helped us deploy and manage email security quickly without disrupting existing workflows. 5.Mimecast provides reliable and consistent performance, scanning emails efficiently while maintaining smooth email delivery and minimal impact on users. 6. The solution offers good value by reducing phishing incidents and minimizing the time spent on email threat investigations, delivering strong ROI. 7. The onboarding process was straightforward, and the support team has been responsive whenever technical guidance or troubleshooting was needed. **What do you dislike about Mimecast Advanced Email Security?** The solution can be expensive for smaller organizations, particularly when additional modules and advanced features are required. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Before Mimecast, we faced challenges with phishing emails, spam, malicious attachments, and impersonation attacks, which increased security risks and IT workload. Mimecast's AI-powered email security now proactively blocks these threats before they reach users. Its easy UI/UX, seamless Microsoft 365 integration, reliable performance, and responsive support have improved email security while reducing administrative effort. Overall, it delivers strong ROI by helping prevent email-borne attacks and improving operational efficiency. ### 2. Strong Phishing Protection **Rating:** 4.5/5.0 stars **Reviewed by:** Nikolay N. | Data engineer, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through a business email account added to their profile **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **AI Translated:** This review has been translated from English using AI. **Reviewed Date:** September 13, 2026 **What do you like best about Mimecast Advanced Email Security?** I was working in one project in my current company it does a good job of detecting and blocking phishing attempts, malicious links, and suspicious emails before they reach the inbox. The setup and onboarding were fairly straightforward, and there are plenty of resources available if you need help understanding a feature or configuring a policy. **What do you dislike about Mimecast Advanced Email Security?** The main thing I would improve is the user interface. There are quite a few settings and options, and it can take some time to find exactly what you need or understand how certain policies work. Some parts of the administration could be more intuitive and easier to navigate. Performance has generally been good, but the overall experience could be simpler for administrators. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** As I already mentioned Mimecast helps protect us from phishing, spam, malicious links, and other email-based threats. It reduces the amount of potentially dangerous email reaching users and gives the IT team better visibility into suspicious messages. This saves time when investigating threats and gives more confidence that users are protected from common email attacks. ### 3. Reliable Threat Detection That Boosts Confidence in University Email Security **Rating:** 4.5/5.0 stars **Reviewed by:** Srikanth B. | Graduate Teaching Assistant, Enterprise (> 1000 emp.) **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** September 03, 2026 **What do you like best about Mimecast Advanced Email Security?** The threat detection is reliable it catches phishing attempts and spoofed sender emails before they reach the inbox, which matters a lot in a university setting where accounts are frequently targeted. I also found the [impersonation protection / attachment scanning] useful for flagging suspicious messages that looked like they came from faculty or IT. Overall it gave our lab more confidence in email security without requiring constant manual monitoring. **What do you dislike about Mimecast Advanced Email Security?** Occasionally there were false positives a few legitimate emails, like ones from academic mailing lists or newsletters, got flagged or quarantined and needed to be manually released. The admin dashboard also had a bit of a learning curve at first before I got used to navigating the reporting and quarantine features. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It’s solving the problem of phishing, spoofing, and malicious attachments reaching our lab’s inbox university accounts are a common target for these kinds of attacks since they’re seen as easier entry points. The benefit is fewer suspicious emails actually landing in front of people, which reduces the risk of someone accidentally clicking something malicious and saves time we’d otherwise spend manually flagging or reporting phishing attempts. ### 4. Advanced Email Security with Excellent Account Management **Rating:** 4.5/5.0 stars **Reviewed by:** Madhumita S. | Sr Manager-Security, Enterprise (> 1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** September 04, 2026 **What do you like best about Mimecast Advanced Email Security?** it provide multilayer email security solution, advance threat detection and protection, human risk management, protects from impersonation and look alike domain attack. excellent account management team who meets weekly, monthly and quarterly to review performance and recoomends best practices suggestion. **What do you dislike about Mimecast Advanced Email Security?** some of the setting are not easy to find need extensive training and guide, some time false positives, pricing requires aggressive negotiation. Policy management and configuration could be time consuming **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** they are fixing the user digest, for premium support customer have dedicated account managers are responsive and sometime s helps customer fast track their escalations. they have added impersonation attack protect as a value add. ### 5. Strong Email Protection with Powerful Investigation Tools **Rating:** 4.5/5.0 stars **Reviewed by:** Satyajit B. | IT Support Engineer, Small-Business (50 or fewer emp.) **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** August 13, 2026 **What do you like best about Mimecast Advanced Email Security?** What I like most about Mimecast Advanced Email Security is that it gives you strong protection without making email support difficult. From an IT support point of view, the investigation tools are especially useful. If an email hasn’t arrived, I can look into what happened. Was it held? Blocked? Filtered for a reason? From there, I can take the right action and explain it clearly to the user. I also like that balance. You’re protecting people from threats like phishing, but you still need email to work smoothly day to day. Good security shouldn’t constantly get in the user’s way. **What do you dislike about Mimecast Advanced Email Security?** Some admin tasks can feel unintuitive at first, and troubleshooting message delivery can sometimes involve checking several areas to find the cause as well as clunky UI. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast helps protect users from phishing, spam and malicious emails while reducing email-related security risks. It also gives me tools to investigate delivery issues, manage blocked or held messages, and resolve email problems more efficiently for users. ### 6. Effective Email Security with Room for Configuration Improvement **Rating:** 4.5/5.0 stars **Reviewed by:** Vishnu G. | Cyber Security Associate, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: Thank You page:** Invitation from G2. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** February 12, 2025 At G2, we prefer fresh reviews and we like to follow up with reviewers. They may not have updated their review text, but have updated their review. **What do you like best about Mimecast Advanced Email Security?** I like using Mimecast Advanced Email Security for both email security and email archiving. It effectively scans all emails, including attachments, which helps in blocking or holding emails with malicious links before they reach users, thereby protecting us from phishing attacks. I appreciate the option to release suspected emails blocked by Mimecast. During the initial setup, having vendor support made the configuration easy because they did all of it. **What do you dislike about Mimecast Advanced Email Security?** I feel the configuration should be more user-friendly. It's a bit complicated to whitelist particular email accounts, like our GM or CEO. It's not easy to create rules for incoming and outgoing emails for individual users. There should be an option to whitelist users so that all outgoing for a particular user shouldn't be blocked, and emails from specific users should not be blocked for specified users. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security filters emails to block malicious ones and prevent phishing. It scans attachments and provides email security and archiving. It also lets me release suspected emails, making email management safer and more efficient. ### 7. Effective Protection against Phishing in Microsoft 365 **Rating:** 5.0/5.0 stars **Reviewed by:** Jose Luis M. | Software Engineer, Small-Business (50 or fewer emp.) **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **AI Translated:** This review has been translated from Spanish; Castilian using AI. **Reviewed Date:** August 29, 2026 **What do you like best about Mimecast Advanced Email Security?** I use Mimecast Advanced Email Security daily at the company, and it really eliminates the problem of human error by blocking phishing attempts at the root before they reach the mail inbox, saving me hours of ticketing. I really like the peace of mind its real-time link analysis provides, as it stops fraudulent links and protects us against malicious modifications attackers might make after sending the email. The initial setup is also very simple and intuitive. **What do you dislike about Mimecast Advanced Email Security?** I find the administration console unintuitive. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security blocks phishing attempts, preventing human errors and saving hours on tickets. It protects us against malicious links modified after sending, providing peace of mind with its real-time analysis. ### 8. KI erkennt gefährliche E-Mails zuverlässig – flexibel, einfach und preislich fair **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Education Management | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account added to their profile **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **AI Translated:** This review has been translated from English using AI. **Reviewed Date:** September 15, 2026 **What do you like best about Mimecast Advanced Email Security?** Die KI-gestützte Erkennung von gefährlichen Emails, und die einfache und unkomplizierte Bedienung. Es ist alles einstellbar und flexibel. Und die Kosten bleiben im Rahmen, es geht auch viel teurer. **What do you dislike about Mimecast Advanced Email Security?** Anfangs war es nicht ganz leicht, aus den Plänen und der Plattform herauszulesen, was denn nun die beste Lösung für unser Unternehmen ist. Nachdem wir aber unsere Compliance-Bedingungen angewendet haben, wurde es dann gut machbar, das richtige Produkt zu wählen. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Wie haben ein verteilte Team, das bei allen Prozessen selbst auf SAS-Lösungen setzt, die wir in eine anderen Bereich ja auch selbst anbieten. Wir brauchen also eine Lösung, sie ohne dedizierten Server bzw. eigene Infrastruktur auskommen kann. ### 9. Reliable, Intuitive Spam Filtering with Strong Weblink Protection **Rating:** 5.0/5.0 stars **Reviewed by:** Tristan R. | Customer Service Manager, Small-Business (50 or fewer emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: Organic Review from User Profile:** Invitation from G2. This reviewer was not provided any incentive by G2 for completing this review. **Reviewed Date:** April 07, 2026 **What do you like best about Mimecast Advanced Email Security?** I appreciate the intuitive spam filtering - this greatly reduces the junk mail in my inbox. The spam filter is reliable, and I receive a reminder email each day that I still have messages "on hold" in moderation. I am glad there is an automated feature that allows me to block senders or domains, but also allows me to permit senders or domains. This is very helpful to reduce the time I spend moderating emails. Another feature I really like is the protection with weblinks. The security with the weblinks also integrates with Teams, so I know I am covered in both Outlook and Teams. **What do you dislike about Mimecast Advanced Email Security?** One downside is the time it takes to receive security codes for weblinks. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast keeps up with the bots and scammers by outsmarting them. It has helped protect me from phishing attempts, and it saves me time by filtering out spam. ### 10. Effortless Security with Seamless Setup **Rating:** 4.5/5.0 stars **Reviewed by:** Marian S. | Network engineer, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** August 18, 2026 **What do you like best about Mimecast Advanced Email Security?** I find Mimecast Advanced Email Security incredibly convenient and quick to deploy and set up for our use. From an operational perspective, it helps us filter phishing and spam, and the management interface makes daily changes easy. **What do you dislike about Mimecast Advanced Email Security?** Nothing in particular, works as intended, few bugs on filtering adds but that is fine for us **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** I use Mimecast Advanced Email Security for preventing spam and malicious attachments. It secures client emails and our own, filters phishing spam, and its management interface makes daily changes easy. It's also convenient and quick to deploy and set up. ### 11. Easy to use and does the job well for enterprises **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Financial Services | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** August 24, 2026 **What do you like best about Mimecast Advanced Email Security?** UI is fairly simple for users. Can easily reject and release blocked emails with different levels of approval/rejection. Easy to view emails and optionally display images. Easy to view blocked and permitted addresses. **What do you dislike about Mimecast Advanced Email Security?** A little clunky in terms of UI, despite being relatively simple. Also difficult to understand different between bounced and on hold and rejected. Maybe needs a glossary. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Helps filter out spam, phishing, and other types of unwanted emails in an inbox that received a lot of them. Good tool for enterprises to manage this across many users. ### 12. Convenient, User-Friendly Mimecast Admin Console—Even Better After the Latest Update **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Computer & Network Security | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** September 01, 2026 **What do you like best about Mimecast Advanced Email Security?** First of all, using the Mimecast Advanced Email Security Admin Console is very convenient and user-friendly. The latest update to the admin console has made it even more consolidated. **What do you dislike about Mimecast Advanced Email Security?** Sometimes, Mimecast Advanced Email Security isn’t able to detect and block well-targeted, organized email threats. As a result, end users can be more vulnerable to well-crafted phishing emails. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security does a great job detecting and stopping email threats at the gateway level, which helps protect end users across the organization from getting phished. ### 13. Stronger Phishing Protection and Less Spam, but a Steep Setup Learning Curve **Rating:** 3.0/5.0 stars **Reviewed by:** Verified User in Animation | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** September 02, 2026 **What do you like best about Mimecast Advanced Email Security?** I feel less risk related to phishing and also I have the feeling that my spam emails are much less usual than they were before using Mimecast email security **What do you dislike about Mimecast Advanced Email Security?** I think I did not like it straight away and I think it could be simplified so that it is easier to get familiar with how everything works when adding it the first time **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security helps protect our organization from phishing, spam, malicious links, and other email-based threats. It provides an additional layer of security for our email environment, which helps cut down on potentially harmful messages reaching users and gives us more confidence in the safety of our day-to-day communications. ### 14. Great Configurability, Needs Better API Integration **Rating:** 3.5/5.0 stars **Reviewed by:** Jeremy A. | Information Technology Analyst, Enterprise (> 1000 emp.) **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** March 17, 2026 **What do you like best about Mimecast Advanced Email Security?** My favorite thing about Mimecast Advanced Email Security is the relationship with our CSR, Brett Lenzi, who always jumps into support tickets, escalates them, and is a constant good-will advocate for us. I like how rules are easily configurable and the platform is always coming out with improvements. I appreciate the creation of custom rules to block new phishing patterns or suspicious domains and the ability to fine-tune filtering based on our specific environment, like by department. The intuitive rule building interface allows me to quickly make adjustments, and I find it valuable that we're continually working to reduce false positives via allow-lists and block-lists. **What do you dislike about Mimecast Advanced Email Security?** We really need an API solution - we are missing out on connecting some services due to lack of API integration - MX records are really a legacy method. Limited automation capabilities - we can't programmatically pull email security metrics into our centralized security dashboards or SIEM platforms. Manual reporting processes - security incident data has to be manually exported rather than automatically fed into IR workflows. Disconnected threat intel - can't easily correlate Mimecast threat data with other security tools to get a full picture of attack campaigns. User provisioning inefficiencies - onboarding new employees or managing departing staff, we have to manually update policies rather than integrating with our identity management system via M365. The mx record approach limited my ability to create the interconnected security ecosystem that modern organizations need. API connectivity would broaden the efficacy of the overall impact of email security within the security stack. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** I use Mimecast Advanced Email Security to secure our email operations. It allows me to create custom rules to block phishing patterns and fine-tune filtering for our specific environment, reducing false positives. The intuitive rule-building interface lets me make quick adjustments. ### 15. Powerful and Customisable with Smooth Onboarding, but Some Scams Slip Through **Rating:** 3.0/5.0 stars **Reviewed by:** Verified User in Computer Networking | Enterprise (> 1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** August 14, 2026 **What do you like best about Mimecast Advanced Email Security?** very powerful and customisable, Microsoft native controls are pretty weak and lackluster comparatively. Good performance and pricing, nice to use UI as well. Integrated well and getting onboarding done was good. **What do you dislike about Mimecast Advanced Email Security?** Some scams still slip through. Admin UI is dated and clunky, policy sprawl gets ugly fast if you don't keep discipline, and pricing creeps every renewal. Also worth deciding if you want a gateway in front of M365 or an API-based approach behind it, that architecture choice matters more than the vendor itself. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Securing emails across org, taking place of limited MSFT options. used for Anti-phishing, Anti-spam, Enhanced filtering and safe links . Does the job. ### 16. Robust Email Security Made Simple and Effective **Rating:** 4.5/5.0 stars **Reviewed by:** Ajay S. | Senior System Engineer, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** December 16, 2025 **What do you like best about Mimecast Advanced Email Security?** Mimecast Advanced Email Security stands out for its strong protection against phishing, malware and impersonation attacks while remaining easy to manage. The interface is intuitive, making daily monitoring, policy updates and threat investigation straightforward even for small security teams. Implementation is smooth and well-documented, with minimal disruption to existing mail flow. Integration with M465 is seamless and features like URL protection, attachment sandboxing and impersonation protection work effectively out of box. **What do you dislike about Mimecast Advanced Email Security?** Mimecast Advanced Email Security is a powerful platform, the interface can feel complex at times, especially for new administrators. Some settings are deeply nested, which can make advanced policy tuning and troubleshooting less intuitive. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security addresses critical email-based threats such as phishing, spear- phishing, malware, ransomware and business email compromise. By providing advanced threat detection, URL and attachment analysis and impersonation protection, it significantly reduces the risk of users falling victim to malicious emails. ### 17. Customizable Email Security Policies That Protect Against Many Threats **Rating:** 3.5/5.0 stars **Reviewed by:** Aaron V. | IT Director, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** February 04, 2026 **What do you like best about Mimecast Advanced Email Security?** It offers a wide range of email security policies with a strong level of customization. We’re able to protect our environment against many different types of threats, including dangerous malware, phishing attacks, impersonation attacks, and more. **What do you dislike about Mimecast Advanced Email Security?** The interface isn’t very intuitive, and it can be a bit difficult to navigate through all of the policies and find exactly what I need. Customer support has been hit or miss as well. Sometimes I get good support, but other times it’s been difficult and lengthy to get my issues resolved. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It solves my email security needs. I require a strong security platform to protect me from spam and phishing attacks, and this helps with that. ### 18. Comprehensive Protection, Effortless Setup **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** September 04, 2026 **What do you like best about Mimecast Advanced Email Security?** I like the protection and security that Mimecast Advanced Email Security offers. It effectively tackles unwanted access and phishing emails. I also appreciate the variety of tools it provides and found the initial setup to be very easy for me. **What do you dislike about Mimecast Advanced Email Security?** I did not like the pricing of some plans as they are expensive **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** I use Mimecast Advanced Email Security for protection against unwanted access and phishing emails, and I like the security it provides. ### 19. Enhances Email Security with Ease of Use **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User | Small-Business (50 or fewer emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** August 08, 2026 **What do you like best about Mimecast Advanced Email Security?** I appreciate the safety and credibility that Mimecast Advanced Email Security provides. It helps me feel more secure, especially with my personal email, where I sometimes receive emails from unknown sources after publishing research papers. This tool helps me interact with credible resources and tools. Setting up Mimecast wasn't complicated at all. **What do you dislike about Mimecast Advanced Email Security?** I think the user experience could be improved. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It makes me feel safer with emails, especially when unsure about the credibility of emails I receive. ### 20. Essential Email Security with Seamless Outlook Integration **Rating:** 4.5/5.0 stars **Reviewed by:** Jissel Q. | Accountant, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** April 29, 2026 **What do you like best about Mimecast Advanced Email Security?** I like the ease of use of Mimecast Advanced Email Security and how well it integrates with Outlook. Having a tool that makes security easy and can be used with our other software is essential. The initial setup was also easy. **What do you dislike about Mimecast Advanced Email Security?** It may block emails I expect to receive, but I prefer it this way for security. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** I use Mimecast Advanced Email Security for secure inbox monitoring and training. It filters security threats and integrates with Outlook easily, making security management simple and effective. ### 21. Email and collaboration security company **Rating:** 4.0/5.0 stars **Reviewed by:** Priti S. | Co-Founder, Consulting, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** February 12, 2024 At G2, we prefer fresh reviews and we like to follow up with reviewers. They may not have updated their review text, but have updated their review. **What do you like best about Mimecast Advanced Email Security?** As a user of Mimecast Cloud Archive, I really appreciate the ease of use and accessibility it provides. I can quickly search through my old emails and find what I need, even on my mobile device. This has saved me a lot of time and frustration. **What do you dislike about Mimecast Advanced Email Security?** Mimecast Cloud Archive is a great tool for storing old emails, but it can be slow and clunky to search through them. I would also prefer to be able to access my archived emails directly from my inbox, rather than having to log in to the web interface. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** As a user of Mimecast Cloud Archive, I've been impressed by its ability to simplify e-Discovery and streamline my IT environment. It's given me peace of mind knowing that my data is never lost and can be quickly restored if needed. ### 22. Mimecast, a Great Mail security tool **Rating:** 4.0/5.0 stars **Reviewed by:** Igor B. | Customer engineer, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** November 18, 2025 **What do you like best about Mimecast Advanced Email Security?** The features that stand out most are its Targeted Threat Protection, and the ease of use it provides. The TTP suite is excellent at neutralizing most attacks, including Impersonation Protection which accurately flags and blocks Business Email Compromise and CEO fraud attempts that traditional filters miss. **What do you dislike about Mimecast Advanced Email Security?** At times, the Administration user interface tends to be slow and unresponsive, which can be frustrating. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Targeted Threat Protection: Features like Impersonation Protection and advanced AI/machine learning stop social engineering attacks that manipulate employees. This directly translates to reduced financial loss and prevented breaches from wire transfer fraud or credential theft ### 23. Highly Effective Spam Email Targeting **Rating:** 5.0/5.0 stars **Reviewed by:** Jaylen J. | Design Intern, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through Google using a business email account **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** April 21, 2026 **What do you like best about Mimecast Advanced Email Security?** the ability to target emails that are spam **What do you dislike about Mimecast Advanced Email Security?** sometimes it doesnt get all the spam emails **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** incoming traffic management ### 24. Effortless Spam Blocking and Enhanced Email Security **Rating:** 5.0/5.0 stars **Reviewed by:** Akhil M. | Manager, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** December 10, 2025 **What do you like best about Mimecast Advanced Email Security?** it easy to identify unknown email and block spam and avoid breach **What do you dislike about Mimecast Advanced Email Security?** sometimes it block genuine user and take time **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** it easy to identify unknown email and block spam and avoid breach data leak ### 25. Consistent, Low-Noise Phishing Protection with Smart Features **Rating:** 5.0/5.0 stars **Reviewed by:** tali k. | Threat Intelligence Analyst, Enterprise (> 1000 emp.) **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** November 18, 2025 **What do you like best about Mimecast Advanced Email Security?** Consistent, low‑noise protection from phishing and impersonation—smart URL rewriting and attachment sandboxing with clear reporting and simple policy control. **What do you dislike about Mimecast Advanced Email Security?** URL rewriting can break links, the admin UI/reporting feel clunky with limited customization, and quarantine workflows sometimes delay legitimate mail. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It closes the biggest email gaps—phishing/BEC, spoofing, and malware in links/attachments—by filtering and detecting impersonation before messages reach users. The result is fewer incidents and account takeovers, less SOC/helpdesk noise, faster investigations via centralized reporting/quarantine, better compliance posture, and more confident users. ### 26. One of the best email security out there **Rating:** 4.5/5.0 stars **Reviewed by:** Mandla N. | IT manager, Small-Business (50 or fewer emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** August 02, 2024 At G2, we prefer fresh reviews and we like to follow up with reviewers. They may not have updated their review text, but have updated their review. **What do you like best about Mimecast Advanced Email Security?** This platform does help with email protection from phishing emails, and it's a great tool in flagging spam emails and blocking it. The ability for administrators to review a suspicious email before allowing it to be delivered to the users is such a great feature **What do you dislike about Mimecast Advanced Email Security?** The URL protection is too aggressive. Sometimes its a legit URL, but the system blocks it. Every once in a while the users are prompted to enroll devcie when they have already did that **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast helps protect our users from threats such as stealing of personal information and phishing emails. The safer the emails the better for the companies, we wouldn't want to be exposed to attacks like ransomware ### 27. AI-Powered Security with Outstanding Threat Protection **Rating:** 4.5/5.0 stars **Reviewed by:** inayat S. | Network Administrator | Infrastructure, Network & Cybersecurity, Enterprise (> 1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** November 20, 2025 **What do you like best about Mimecast Advanced Email Security?** AI-Powered, Multi-Layer Detection Strong Phishing / Impersonation Protection Excellent Spam & Virus Defense Deployment Flexibility Integrated Platform **What do you dislike about Mimecast Advanced Email Security?** Steep Learning Curve / Complexity Aggressive Out-of-the-Box Settings / False Positives **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Phishing & Spear-Phishing Business Email Compromise (BEC) ### 28. Mimecast Advanced Email Security **Rating:** 5.0/5.0 stars **Reviewed by:** aqib j. | IT Administrator, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through a business email account added to their profile **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **Reviewed Date:** July 07, 2025 **What do you like best about Mimecast Advanced Email Security?** It provides the best security features to handle internal and external emails. **What do you dislike about Mimecast Advanced Email Security?** I don't think there is anything I dislike about this tool because it always helps us to increase security features. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Protection against phishing and spear-phishing attacks: It blocks malicious emails and impersonation attempts, reducing the risk of credential theft and fraud.

Defense against malware and ransomware: It scans attachments and links to prevent harmful content from reaching users, protecting our systems and data.

Spam and graymail filtering: It ensures our mailboxes stay cleaner and employees remain productive by minimizing unwanted or irrelevant emails.

Data loss prevention: It helps enforce security policies to prevent sensitive information from being leaked or sent in error. ### 29. Mimecast, the most favoured email gateway **Rating:** 4.5/5.0 stars **Reviewed by:** Adam J. | Cyber Security Engineer, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** February 14, 2025 **What do you like best about Mimecast Advanced Email Security?** The capabilities. There is a range of features including journaling, staff awareness and the obvious security features. The support team are really helpful and will conduct tenant reviews when requested, to ensure you are getting the most out of the product. There are a wealth of integrations which can be used also, which helps in automating some of the frequent manual tasks. The service itself is easy to implement and set up, for both on prem and cloud environments **What do you dislike about Mimecast Advanced Email Security?** The product itself can be easy to use, although the settings can be a bit tedious to find, as they can often be found in multiple places **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast helps to meet our data retention requirements, meaning we are able to retain our digital communications easily with the benefit of being searchable ### 30. Great when we started with them, declined quickly after implementation **Rating:** 1.5/5.0 stars **Reviewed by:** Verified User in Electrical/Electronic Manufacturing | Enterprise (> 1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Validated Reviewer:** Validated through Google One Tap using a business email account **Source: Thank You page:** Invitation from G2. This reviewer was not provided any incentive by G2 for completing this review. **Reviewed Date:** October 01, 2025 **What do you like best about Mimecast Advanced Email Security?** Included email signatures in their offering for free as well as the tabbed interface made switching between consoles very easy! **What do you dislike about Mimecast Advanced Email Security?** The product was 'ok' but not the best at catching everything. The real reason for the decline was in support. Getting customer service on the phone during outages was horrible and took entirely too long in a SEV-A scenario. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** They did an ok job at first at protecting us from threats, however as the time went on it seemed like they were always a step behind the competitors in this space. ### 31. Reliable email Security For modern Business **Rating:** 3.5/5.0 stars **Reviewed by:** Andrew V. | IT Engineer, Small-Business (50 or fewer emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was not provided any incentive by G2 for completing this review. **Reviewed Date:** June 17, 2025 **What do you like best about Mimecast Advanced Email Security?** The use of Data Loss Prevention which prevents sensitive data leaks is one of the things I like about Mimecast. Mimecast integrates very well with Office365. **What do you dislike about Mimecast Advanced Email Security?** The initial setup is a bit complex, things like Policies and connectors are a bit challenging to get right. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** The most important problem Mimecast is solving is email-based cyber threats such as impersonation attacks, malware, ransomware, as well as phishing. ### 32. Mimecast is awesome for email phishing/spam **Rating:** 5.0/5.0 stars **Reviewed by:** Patrick L. | CIO, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** June 30, 2025 **What do you like best about Mimecast Advanced Email Security?** How easy it is to find emails or block them **What do you dislike about Mimecast Advanced Email Security?** If a emails gets rejected then we would have to allow them then have that user resend the email which can get annoying to the user side resending documents a couple times **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Catching/blocking spam/phishing emails and also blocking users when clicking on a bad sites/link ### 33. Mimecast our email buddy who doesn't miss **Rating:** 5.0/5.0 stars **Reviewed by:** Sam D. | IT Support, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** July 02, 2025 **What do you like best about Mimecast Advanced Email Security?** How many features you can reject/block an email address/domain **What do you dislike about Mimecast Advanced Email Security?** Messages that are deferred/rejected need to be resent after allowing that email address/domain **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Blocking/deferring emails to a different queue and allowing the user to accept or block that email allows IT to do other task instead of unlocking all emails! ### 34. Strong Email Security, But Requires Some Fine-Tuning **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Financial Services | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** February 14, 2025 **What do you like best about Mimecast Advanced Email Security?** Mimecast Advanced Email Security does a good job of blocking phishing, malware, and impersonation attacks before they reach your inbox. The impersonation protection helps catch CEO fraud and spoofed emails. Setup is straightforward, and once it's running, it mostly takes care of itself. The admin dashboard has a lot of options, which can feel a bit overwhelming at first, but it gets easier to navigate over time. It’s not perfect—false positives happen now and then—but overall, it’s a solid option for keeping email threats in check. **What do you dislike about Mimecast Advanced Email Security?** One downside is that it can be a bit aggressive with filtering, leading to false positives that require manual review. The admin dashboard, while powerful, isn’t the most intuitive and takes some time to get used to. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security helps block phishing attempts, malware, and impersonation attacks before they reach my users inbox, reducing the risk of security breaches. The URL and attachment scanning add an extra layer of protection against malicious links and files. It also cuts down on spam, which keeps my inbox cleaner and more manageable. ### 35. Mimecast as a Super Admin **Rating:** 4.5/5.0 stars **Reviewed by:** Jasher M. | IT Support, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** June 24, 2025 **What do you like best about Mimecast Advanced Email Security?** Very useful for our law firm in many ways **What do you dislike about Mimecast Advanced Email Security?** There is plenty to love about what Mimecast does and therefore nothing bad to say! **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Blocking unwanted or soliciting emails that would otherwise come through and disrupt the work day with many virus/phishing emails out there on the horizon! ### 36. Best E-Mail security product available **Rating:** 5.0/5.0 stars **Reviewed by:** Dencel B. | Senior principal consultant, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through Google using a business email account **Incentivized:** This reviewer was offered a nominal gift card as thank you for completing this review. **Source: G2 invite:** Invitation from G2. This reviewer was offered a nominal gift card as thank you for completing this review. **G2 Icon:** Our network of Icons are G2 members who are recognized for their outstanding contributions and commitment to helping others through their expertise. **Reviewed Date:** July 03, 2025 **What do you like best about Mimecast Advanced Email Security?** Powerful, easy to use & integrate—rich features, fast setup, and stellar support make it unbeatable. **What do you dislike about Mimecast Advanced Email Security?** Some features feel buried; UI can be clunky at times and policy setup needs clearer guidance. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** anti-virus, anti-spam and best in brand threat detection ### 37. Mimecast services **Rating:** 4.0/5.0 stars **Reviewed by:** Spencer B. | Information Technology Support Specialist, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** May 27, 2025 **What do you like best about Mimecast Advanced Email Security?** Blocking inbound emails to users for whatever reason if it contains bad malware **What do you dislike about Mimecast Advanced Email Security?** The rejected messages you can't see but see that they hit the system **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** The permitted sender if users are in communications with a specific email domain/email address and they can permit the sender on their ends instead of getting IT involved! ### 38. Mimecast is a defensive email application **Rating:** 3.5/5.0 stars **Reviewed by:** Verified User in Legal Services | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** July 09, 2025 **What do you like best about Mimecast Advanced Email Security?** The fact is blocks emails that otherwise would hit the network and could cause damage **What do you dislike about Mimecast Advanced Email Security?** The fact that email security has to be put into policies and if policies are not properly done you can have serious issues! **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** The problem it is solving is blocking emails we know are spam and not to allow them in so someone can give access to a stranger on the streets! ### 39. wonderful and refreshing **Rating:** 5.0/5.0 stars **Reviewed by:** David A. | Director of IT and Cybersecurity, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** May 20, 2025 **What do you like best about Mimecast Advanced Email Security?** Great UI and easy to navigate, quick learning curve. **What do you dislike about Mimecast Advanced Email Security?** The setup is a bit annoying as we switched over, it seemed spam mail got through alot in the beginng and some emails that should get through did not. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** helping to protect our users from phishing and spam. ### 40. Mimecast Cloud Archive has been a great solution to have all of our emails archived **Rating:** 4.5/5.0 stars **Reviewed by:** Rick H. | Network Administrator, Mid-Market (51-1000 emp.) **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** June 02, 2025 **What do you like best about Mimecast Advanced Email Security?** Updates are easily applied and journaling has not been interrupted since our initial setup. Customer support has always been helpful and responsive. **What do you dislike about Mimecast Advanced Email Security?** Since the initial setup of Exchange to journal to Mimecast, we have had only a couple issues. Journaling was not interrupted. The issue was with the folder sync so that users could see their inbox as it is in Outlook. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** We have an archive that we know is available if we want to restore any emails. ### 41. Mimecast Might Be the Worst Enterprise Software Ever **Rating:** 0.0/5.0 stars **Reviewed by:** Bill H. | Executive Chairman, Small-Business (50 or fewer emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** January 28, 2025 **What do you like best about Mimecast Advanced Email Security?** Nothing good to say. The service has not only been useless but counterproductive since the day we installed it. **What do you dislike about Mimecast Advanced Email Security?** 1) It blocks an incredible amount of easily identifiable legitimate emails including clients, from family members and - this is the best - emails from the company that installed it on our servers. 2) It has ignored every whitelist request we've given it & 3) customer support is non-existent. I honestly don't understand how anyone with business accountability can allow this software to exist in their organization (we are removing it). **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It isn't solving any problems, it's creating them. ### 42. Nice and Apt **Rating:** 5.0/5.0 stars **Reviewed by:** Mohamed A. | Senior Network Engineer, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Source: Organic:** Organic review. This review was written entirely without invitation or incentive from G2, a seller, or an affiliate. **Reviewed Date:** November 07, 2022 At G2, we prefer fresh reviews and we like to follow up with reviewers. They may not have updated their review text, but have updated their review. **What do you like best about Mimecast Advanced Email Security?** Among many, the most helpful features are impersonation, URL protection, Anti-Spoofing and Attachment control. The upside is the control and visibility of malicious/suspicious emails like spam, attachments and suspicious links. **What do you dislike about Mimecast Advanced Email Security?** The least helpful is the limited log and mail retention period, which is 30 days by default. The downside which faces is that granular filtration doesn't function as expected. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It controls the chance of spam and malicious activity through emails and protects users' visits to suspicious or harmful links, knowingly or unknowingly. It also provides controls on authorized outbound senders. ### 43. I always feel safe with Mimecast in front of my Email Flow!!! **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Non-Profit Organization Management | Mid-Market (51-1000 emp.) This reviewer's identity has been verified by our review moderation team. They have asked not to show their name, job title, or picture. **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** May 22, 2025 **What do you like best about Mimecast Advanced Email Security?** This is truly set it and forget it! Support is always there to provide guidance for any issues. Working with the team is pleasant and always fruitful. I have zero complaints after over 8 years working with directly. **What do you dislike about Mimecast Advanced Email Security?** There isn't much I dislike. Documentation can be a little cumbersome, but support is always there to assist! **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Protects my user base from malicious emails and attacks!! Helps me sleep at night knowing we are covered! ### 44. Mimecast is awesome and helps us block out emails we do not need! **Rating:** 4.5/5.0 stars **Reviewed by:** D D. | CTO, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** May 22, 2025 **What do you like best about Mimecast Advanced Email Security?** Held mimecast digest is great too if you need something **What do you dislike about Mimecast Advanced Email Security?** The rejected emails do not make it to the server! I would like to review if possible sometimes blocks for nothing **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** All the above ### 45. Balancing Security and Usability - Mimecast's Strengths and Challenges **Rating:** 3.5/5.0 stars **Reviewed by:** Melissa T. | ICT Manager, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: Seller invite:** Invitation from a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** September 17, 2024 **What do you like best about Mimecast Advanced Email Security?** Overall, I value the security, flexibility, and user-friendly nature of Mimecast Advanced Email Security. It is a powerful tool for protecting email communications. It allows me to set customised policies that align with my firm's specific needs. Whether it's scanning attachments, monitoring URLs, or filtering emails based on specific content, the flexibility is excellent. **What do you dislike about Mimecast Advanced Email Security?** Mimecast sometimes flags legitimate emails as suspicious, leading to delays in communication. While it’s good at catching threats, managing false positives can become tedious. While the interface is generally intuitive, new users can face a learning curve, particularly in understanding the more nuanced security policies and tools within the platform. Training or familiarisation may be required to fully leverage its potential. There are some advanced configurations that can feel quite complex. Setting up intricate rules can be more time consuming and require more expertise than expected. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** It is resolving the following for us :- Phishing and Impersonation Attacks Malware and Ransomware Protection Data Loss Prevention Email Continuity and Archiving Spam and Junk Filtering ### 46. Amazing product, friendly interface, zero account management **Rating:** 4.5/5.0 stars **Reviewed by:** Rod D. | IT Director, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: Seller invite:** Invitation from a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** September 17, 2024 **What do you like best about Mimecast Advanced Email Security?** The best thing about Mimecast is how easy it is to manage and implement. From all the basics of emails protection like allow/deny lists, to more advanced features like greylist checks and DMARC rules, it does all from a very friendly interface and once you get used to its logic, the daily usage of IT admins, to the sporadic use by end users just makes this product probably the best in class on its market. **What do you dislike about Mimecast Advanced Email Security?** The only caveat to something so ease to integrate and manage is the customer support and account management that is often lacking. Customer support is not always helpful, or will only provide a link to their knowledgebase rather than helping with troubleshooting, and it's very hard to find anyone on the account management side of the house that can be a point of contact for escalations, renewals, and so on. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Managing permit/block lists based on return-path or sending domain, blocking spam, creating rules, all on an easy-to-manage interface, with granular permissions that allows service desk roles to do the basic and level 3 admins to manage complex rules. ### 47. It's amazing how many emails it stops for us! **Rating:** 5.0/5.0 stars **Reviewed by:** Drew B. | Systems Administrator, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: Seller invite:** Invitation from a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** September 13, 2024 **What do you like best about Mimecast Advanced Email Security?** The automated spam screening is probably the best feature as I do not need to worry about emails that fail graylisting, are in RBL, ones that Mimecast detects as having spam content, and email addresses/domains that users themselves want to be blocked.

The customisation of the policies is fantastic too and really allows us to easily finetune what actions we want taking on certain emails and allows us to override it when we do not want action to be taken.

Customer support is really good and the documentation available is useful. I have also completed the Mimecast University and I would recommend this to anyone who is administrating Mimecast.

The large file send and secure message send are part of our business practices now and we feel safe knowing that these types of emails are sent correctly and securely, and with automatically generated instructions to the recipients so we don't need to explain to them what to do. **What do you dislike about Mimecast Advanced Email Security?** The upgrades last year to the administrator console were in my opinion a bit of a downgrade. I have given it time to settle in my mind, but I liked having the tabs open rather than having to open a tab on my browser. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Spam, sharing large emails, sending secure emails, phishing attempts, email archiving ### 48. Policies work well, Anti-spam not so much. **Rating:** 5.0/5.0 stars **Reviewed by:** Mitchell Y. | Network & Systems Engineer, Small-Business (50 or fewer emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** February 06, 2025 **What do you like best about Mimecast Advanced Email Security?** Mimecast is mandatory to stop the troves of spam and phishing sent to emails scraped off our website. **What do you dislike about Mimecast Advanced Email Security?** The spam detection has many false positives. Although it is good to lean that direction with detection, it still has many false negatives that get through the cracks. Both are issues that I have to deal with manually. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Benefits us by reducing manual email spam checks, and relies less on the user's ability to sift through spam emails. ### 49. A Robust and Reliable Solution for Comprehensive Email Protection **Rating:** 5.0/5.0 stars **Reviewed by:** Andrew M. | Cyber Security Architect, Information Technology and Services, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through LinkedIn **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: Seller invite:** Invitation from a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** September 19, 2024 **What do you like best about Mimecast Advanced Email Security?** What we like best about Mimecast Advanced Email Security is its comprehensive protection against a wide range of email threats, including phishing, malware, and spam. The user-friendly interface and easy integration with Office 365 made it simple to manage and deploy, and the customizable policies allowed us to tailor the security settings to our specific needs. The Customer Support is very knowledgable and gets back to us in a timely manner. **What do you dislike about Mimecast Advanced Email Security?** At times, legitimate emails get flagged as spam or potential threats, requiring manual intervention to release them. This can be a bit time-consuming and disruptive for users waiting on important messages. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security is solving several critical problems for us, primarily by protecting against email-based threats like phishing, malware, ransomware, and spam. Before implementing Mimecast, our inboxes were frequently targeted with malicious emails, putting both our data and operations at risk. ### 50. Mimecast continues to protect against email threats **Rating:** 5.0/5.0 stars **Reviewed by:** Fabio F. | IT Manager, Mid-Market (51-1000 emp.) **Current User:** The reviewer uploaded a screenshot or submitted the review in-app verifying them as current user. **Validated Reviewer:** Validated through a business email account **Incentivized:** This reviewer was offered a nominal incentive as thanks for completing this review. **Source: G2 invite on behalf of seller:** Invitation from G2 on behalf of a seller or affiliate. This reviewer was offered a nominal incentive as thanks for completing this review. **Reviewed Date:** February 11, 2025 **What do you like best about Mimecast Advanced Email Security?** Mimecast Advanced Email Security provides AI-driven threat protection, blocking impersonation attacks, phishing, and malware. It scans links and attachments in real-time, ensures email continuity, and enhances user awareness through training and alerts. Advanced features. **What do you dislike about Mimecast Advanced Email Security?** Sometimes complex configuration is required to get the desired result. User admin training. Cost compared to some alternatives **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Advanced security to protect from email compromise. 100 year email archiving is a big positive especially with high staff turnover. ## Mimecast Advanced Email Security Discussions - [Has anyone implemented ingesting the Audit logs from Mimecast into Graylog?](https://www.g2.com/discussions/has-anyone-implemented-ingesting-the-audit-logs-from-mimecast-into-graylog) - 3 comments, 1 upvote - [What is Mimecast Email Security with Targeted Threat Protection used for?](https://www.g2.com/discussions/what-is-mimecast-email-security-with-targeted-threat-protection-used-for) - 2 comments - [View Mimecast Advanced Email Security pricing details and edition comparison](https://www.g2.com/products/mimecast-advanced-email-security/reviews?section=pricing&secure%5Bexpires_at%5D=2026-09-17+14%3A17%3A18+-0500&secure%5Bsession_id%5D=6946f185-769e-4a91-8c08-8134469c9a78&secure%5Btoken%5D=6b7415757201b6d1af30650b2978e2ef9856434b0f2497ab317cb2f6f3cabf33&format=llm_user) ## Mimecast Advanced Email Security Features **Additional Functionality** - Phishing Protection - Threat Response - Domain Check - Security Auditing - AI/Machine Learning - Third-Party Integrations - AI Copilot - Reporting/Analytics - Anomaly/Malware Detection - SURLB/URIBL Filtering - Activity Dashboard - Scheduled/Automated Reports - For MSPs - Whitelisting/Blacklisting - Fraud Detection - Spam Blocker - Spam Quarantine - API - Data Leak Prevention - Encryption - Audit Trail - Real-Time Monitoring - Spam Analysis - Policy Management - Alerts/Escalation - Email Management - Vulnerability Scanning - Generative AI - Threat Protection - Email Attachment Protection - Email Filtering - Two-Factor Authentication **Administration** - Intelligence Reporting - Email Integration Suppor - Access Management - Data Loss Prevention **Administration** - Compliance - Intelligence Reporting - Email Clients - Role-Based Rules **Functionality** - Anti-Spam - Anti-Malware - Anti-Phishing - SURLB/URIBL Filtering - Quarantine - Outbound Email Monitoring - Advanced Threat Intelligence/Protection - Archiving - Reporting - Email Attachment Protection - Phishing Protection - Single Sign On - Email Monitoring - Real-Time Monitoring **Maintenance** - Auditing - Allow and block lists - Compliance - Archiving **Detection** - Data Exfiltration Detection - Activity Monitoring - Real-Time Detection **Agentic AI - Secure Email Gateway** - Proactive Assistance **Additional Functionality** - Activity Dashboard - Audit Trail - Allow/Block List - Generative AI - Vulnerability Scanning - Active Directory Integration - Threat Response - Search - Intrusion Detection System - Compliance Management - Spam Blocker - Encryption - Data Verification - Audit Management - Alerts/Escalation - Policy Management - Customizable Reports - Archiving & Retention - Data Synchronization - Activity Tracking - Microsoft Outlook Integration - SSL Security - Secure Login - Third-Party Integrations - Spam Detection - Real-Time Notifications - Scheduled/Automated Reports - Email Tracking - Fraud Detection - Event Logs - Data Retention Management - Backup and Recovery - Threat Intelligence - Whitelisting/Blacklisting - Data Import/Export - Two-Factor Authentication - Reporting & Statistics - Anti Virus - Data Loss Prevention - Risk Alerts - Access Controls/Permissions - Password Management - AI Copilot - Authentication **Security** - Anti-Malware/Anti-Spam - Encryption - Quarantine - Advanced Threat Protection (ATP) - Anti-Phishing - Account takeover prevention **Protection** - Targeted Attack Prevention - Policy Enforcement - Spam Filtering **Agentic AI - Intelligent Email Protection** - Autonomous Task Execution - Adaptive Learning ## Top Mimecast Advanced Email Security Alternatives - [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) - 4.6/5.0 (589 reviews) - [SpamTitan Email Security](https://www.g2.com/products/spamtitan-email-security/reviews) - 4.5/5.0 (176 reviews) - [Cloudflare One (SASE)](https://www.g2.com/products/cloudflare-one-sase/reviews) - 4.6/5.0 (102 reviews)