# 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:** 320 ## 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 **What users like:** - Users value the **advanced AI-driven threat protection** of Mimecast, effectively blocking phishing and malware threats. (49 reviews) - Users find the **ease of implementation and administration** of Mimecast Advanced Email Security exceptional and hassle-free. (44 reviews) - Users value the **robust security features** of Mimecast, ensuring effective protection against spam and malware threats. (34 reviews) - Users appreciate the **Targeted Threat Protection** and ease of use in Mimecast Advanced Email Security for enhanced email safety. (26 reviews) - Users appreciate the **effective spam blocking** of Mimecast, ensuring email safety and preventing daily threats. (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 find the **interface complexity** of Mimecast Advanced Email Security challenging, particularly for new administrators and advanced configurations. (21 reviews) - Users experience **email filtering issues** that disrupt communication and complicate the retrieval of legitimate emails. (17 reviews) - Users face **email issues** with Mimecast, including link breaks, spam flagging, and clunky admin workflows affecting efficiency. (16 reviews) - Users face significant **configuration difficulties** with Mimecast Advanced Email Security, impacting setup and ongoing adjustments. (15 reviews) - Users report that Mimecast can generate **false positives** , causing delays and manual review of legitimate emails. (15 reviews) - Users face issues with **ineffective detection** , as genuine emails are often marked as threats, disrupting workflows. (15 reviews) - Poor Customer Support (14 reviews) - Poor Detection (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. Reliable email Secuity For modern Business **Rating:** 3.5/5.0 stars **Reviewed by:** Andrew V. | IT Engineer, Small-Business (50 or fewer emp.) **Reviewed Date:** June 17, 2025 **What do you like best about Mimecast Advanced Email Security?** The use of Data Loss Presentation 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 ### 2. Mimecast continues to protect against email threats **Rating:** 5.0/5.0 stars **Reviewed by:** Fabio F. | IT Manager, Mid-Market (51-1000 emp.) **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. ### 3. Great system but with some problems **Rating:** 3.5/5.0 stars **Reviewed by:** Verified User in Insurance | Mid-Market (51-1000 emp.) **Reviewed Date:** February 14, 2025 **What do you like best about Mimecast Advanced Email Security?** Once configured the system works well and does it's job without any further intervention. There are a good number of features and the archiving system works well **What do you dislike about Mimecast Advanced Email Security?** There still seem to be a number of bugs in the system, such as SAML errors when logging in. This happens with a number of our admin users. Initial setup was quite complicated **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** The system provides our email security and archiving solution. It means we can easily managed our systems via a cloud based platform ### 4. Capable and robust, if a little complex **Rating:** 4.5/5.0 stars **Reviewed by:** Eric K. | IT Manager, Small-Business (50 or fewer emp.) **Reviewed Date:** February 25, 2025 **What do you like best about Mimecast Advanced Email Security?** It's good at keeping our email safe. It's doing what it says it'll do **What do you dislike about Mimecast Advanced Email Security?** The UI and some of the way things are configured are a bit too complex. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Flagging suspicious email, blocking spam, etc ### 5. Easy to Manage Advanced Email security **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Insurance | Mid-Market (51-1000 emp.) **Reviewed Date:** September 16, 2024 **What do you like best about Mimecast Advanced Email Security?** Mimecast Advanced Email Security is a great tool to add a layer of protection to corporate email solution, it has lots features which cover many elements of an emails journey and contents giving our end users confidence when working with email. It is easy to implement and once set up requires little intervention from IT staff in the day to day management of email send and recieve functionality. Users are able to self assess held of flagged emails and decide whether they think they are safe or malicious based on Mimecasts recommendations. Mimecast Advanced Email Security integrated straight into our Microsoft365 tenancy with very little effort and the Outlook add in allows a further level of integration and convenience to the end user. Mimecast Support has improved vastly over the years we have been a customer, it is now a very quick and easy way of sorting out any issues that do arise. **What do you dislike about Mimecast Advanced Email Security?** Mimecast Advanced Email Security can take some time to tailor the impact on end users to begin with. Time and effort is needed to construct the correct whitelists and exceptions, as well as adjusting the spam filters to avoid an excessive amount of email being incorrectly held. The only other drawback is the usability of the administration portal, features and their policies can be hard to find as there are quite a few different levels to each function. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Since the introduction of Mimecast Advanced Email Security in our business we have seen a massive reduction in phishing and other malicious emails being delivered to users inboxes. On top of the reduction of risk associated with this, we have also seen our users become much more aware of suspicious emails thanks to the messaging they see from the Mimecast product. The IT team now spends a lot less time in the administation and 'checking' of emails coming into the business, it has enabled our users to be more self sufficient and confident in what they are responding to. ### 6. Great Application but confusing polices config. **Rating:** 3.5/5.0 stars **Reviewed by:** Verified User in Non-Profit Organization Management | Mid-Market (51-1000 emp.) **Reviewed Date:** September 12, 2024 **What do you like best about Mimecast Advanced Email Security?** I have been using Mimecast advanced Email security for almost two years now and use it almost everyday. The Best feature I would say is its robust policies and variety of polcies which covers all the of threate coming from email. It has the best URL protection complemented by Sandboxing. The implementaion was also easy thanks to their support staffs and Integration with m365 was easy. **What do you dislike about Mimecast Advanced Email Security?** One of the main frustrations with Mimecast Advanced Email Security is its not so perfect New Outlook addin. It requires continous loggin and it doesn't work as good as the old Outlook Plugin. The variety of policies also makes it difficult to track and configure new policies, making it confusing. This lack ease in policy configuration can slow down the process and require extra effort to manage effectively, having to contact Mimecast Support everytime but the support is always helpful which is a plus. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast is benefiting us with anti spoofing, blocking spams, malwares and links basically helping our org and staff be sage in Outlook. ### 7. Mimecast Advanced Email Security **Rating:** 3.5/5.0 stars **Reviewed by:** Jessica C. | Chief Technology Officer, Mid-Market (51-1000 emp.) **Reviewed Date:** June 25, 2024 **What do you like best about Mimecast Advanced Email Security?** I like the ease of knowing that potential and known malicious e-mails are stopped from being delivered to the end user. Easy to use and give a lot of insight into the threats that are part of your e-mail attack surface. For the most part the implementation is easy, until you need to configure specific rules and policies that are specific to an organization. We use it daily to look at the held e-mails and review what is undeliverable via the rules and policies. Easily integrates with M365. **What do you dislike about Mimecast Advanced Email Security?** The downside is the support is a little offputting, if you are past your implementation phase. Some of the rule and policies are hard to configure through implementation. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Lessening the attack vector for the end user, by stopping most of the malicious e-mails that are phishing attempts. ### 8. Fully featured email protection **Rating:** 4.5/5.0 stars **Reviewed by:** David B. | Director of Enterprise Systems, Mid-Market (51-1000 emp.) **Reviewed Date:** September 19, 2024 **What do you like best about Mimecast Advanced Email Security?** The ability for users to manage their own whitelist easly and the Mimecast for Outlook plugin. **What do you dislike about Mimecast Advanced Email Security?** Creating and managing policies is sometimes confusing and would like to see it simplified. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** The amount of SPAM and Phishing emails has been reduced by 98%. Impersonation attacks are nearly entirely blocked. We have had no infected attachements allowed through email. URL rewriting is working well to protect from malicious sites. We have been able to tune our policies to nearly eliminate false positives. Send secured/encrypted emails is simple for the users. Send large file attachements using the Mimecast process is working very well. The user digest and Outlook plugin allow the users to easliy manage their own White and Black lists and to release held emails. ### 9. We have significantly improved email protection and productivity in our company **Rating:** 4.0/5.0 stars **Reviewed by:** Laura C. | Senior Data Analyst, Civic & Social Organization, Small-Business (50 or fewer emp.) **Reviewed Date:** July 20, 2024 **What do you like best about Mimecast Advanced Email Security?** In my opinion, what sets Mimecast Advanced Email Security apart is the comprehensive protection of emails that it offers. It integrates well with Office 365 and boosts our security while doing so without any fuss. One is the real time threat intelligence which is impressive in keeping abreast of new threats. Its spam filter works very well, cutting the number of spam emails to a great extent. This has indeed enhanced our cybersecurity since this software is easy to use and the security measures employed are very effective. **What do you dislike about Mimecast Advanced Email Security?** A major drawback in Mimecast Advanced Email Security is that the spam filter occasionally mistakes genuine messages for spam, effectively holding the emails hostage until the problem is manually sorted out. This has affected the way we work as often there is need to check the spam folder. Also, it was no easy task to complete the configuration of the first level as compared to the second level, which was a complex affair and took considerable time of effort from our IT department. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast Advanced Email Security has successfully addressed our concerns on phishing and malware, delivering an excellent solution for email security. Real time threat intelligence and spam filtering have been of great help in enhancing our cybersecurity. It also has a positive impact for our IT team because they are relieved from so many security incidents and can manage more important tasks. Further, there has been a decrease of spam and phishing attempt which has improved productivity and safer communication generally. ### 10. Generally a solid core product but support and onboarding are mediocre **Rating:** 3.5/5.0 stars **Reviewed by:** Verified User in Pharmaceuticals | Mid-Market (51-1000 emp.) **Reviewed Date:** June 24, 2024 **What do you like best about Mimecast Advanced Email Security?** The security gateway is a very robust and highly customizable solution. Once you have it up and running it functions quite well and does a good job of stopping threats. It layers well with Google Workspaces, once you have it up and running. Users find the security awareness training videos quite enterntaining and the short format helps with compliance. Users find it fairly easy to self service their quarrantines after a little training, saving on admin work. **What do you dislike about Mimecast Advanced Email Security?** Support is knowledgable but I get the impression they are very overtaxed. The onboarding process was a slog, we purchased the integration assistance, but it took weeks for our implementation specialist to acutally reach out to us, by that time we had already started configuring the product ourselves. I would strongly recommend purchasing the implementation assistance, especially if you plan to use this with Google Workspaces. It's a rather involved process and you're going to have a bad time if (when) something goes wrong as the implementation docs are rather terse. The product also requires quite a lot of fine tuning and adjustment in the first few weeks, so expect some degree of complaints from your users. Again, having the assistance of the implementation specialist is key here otherwise you'll need to deal with T1 support which is not always the most helpful or responsive. The SAT dashboards are pretty but a bit sparse. Getting simple information like a list of non-compliant users is more work than it should be. Google Workspace integration is also a little bare-bones. It would be nice for users to be able to report messages via the Gmail interface instead of the Mimecast portal. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Securing our email from outside threats and Security Awareness Training. It's defintely another layer of security preventing our users from engaging in risky online behavior. ### 11. Covers all the basess for email security and at a high level **Rating:** 4.5/5.0 stars **Reviewed by:** Jeff H. | IT Manager / Security Officer, Mid-Market (51-1000 emp.) **Reviewed Date:** September 19, 2024 **What do you like best about Mimecast Advanced Email Security?** Always on with multiplle datacenters. All the tools our end users need to be secure. **What do you dislike about Mimecast Advanced Email Security?** With high end tools comes complexity. Becausse off the complexity it can be challanging to configure. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Our main security needs after the standard email security are HIPPA and PCI which Mimecast does very well for us. Its topped off with secure large file send and encrypted messages. ### 12. Comprehensive email security gateway **Rating:** 5.0/5.0 stars **Reviewed by:** Tony A. | IT Manager, Mid-Market (51-1000 emp.) **Reviewed Date:** September 19, 2024 **What do you like best about Mimecast Advanced Email Security?** Very configurable, helpful support staff, supports both inbound and outbound scanning. Clear help documents on how to set up. **What do you dislike about Mimecast Advanced Email Security?** Can be a steep learning curve. Sometimes difficult to find the correct configuration screen due to amount of menu choices. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Inbound and outbound spam / phishing / virus and attachment scanning. ### 13. Mimecast Works **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Retail | Mid-Market (51-1000 emp.) **Reviewed Date:** September 19, 2024 **What do you like best about Mimecast Advanced Email Security?** I like that Mimecast can be custimized to fit many different use cases and scenarios **What do you dislike about Mimecast Advanced Email Security?** Configuration can be confusing at times. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Mimecast helps greatly with impersonization attempts and other forms of phishing that native o365 tools do not catch well. ### 14. The most comprehensive Email security solution I've used so far **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Mechanical or Industrial Engineering | Mid-Market (51-1000 emp.) **Reviewed Date:** July 31, 2019 **What do you like best about Mimecast Advanced Email Security?** The level of detail you can go to when defining policies. You can be very specific about what you want to block or filter. Depending on your package you have a lot of features on hand, be sure to get to know what is what and how you can overlap/layer the policies. **What do you dislike about Mimecast Advanced Email Security?** The complexity is great on one hand, but it can be a little tricky to navigate through all of the policy settings and menus on the portal. It's essential you have some form of on-boarding consultancy when setting up, as it's too detailed to just pick up and run with. You want to get it right. **Recommendations to others considering Mimecast Advanced Email Security:** Make sure you engage with a partner/reseller who can support the product, it's a detailed solution and it's critical you get it right before going live. **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** Detecting Email threats that come into the business, plus we use the solution for archiving also, which solves a compliance issue. User Awareness training is carried out using their excellent short videos which even are end users are generally positive about. ### 15. Pretty effective tool for cyber security **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Non-Profit Organization Management | Mid-Market (51-1000 emp.) **Reviewed Date:** August 01, 2024 **What do you like best about Mimecast Advanced Email Security?** The email filters, various policies and how user friendly it is **What do you dislike about Mimecast Advanced Email Security?** If policies aren't configured properly, it can be a pain **What problems is Mimecast Advanced Email Security solving and how is that benefiting you?** We used to suffer a lot of phishing but now mimecast handles it for us effortlessly ## 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?filters%5Bcomment_answer_values%5D=&filters%5Bsentiment_snippet%5D=1895654&order=g2_default§ion=pricing&secure%5Bexpires_at%5D=2026-05-17+14%3A32%3A54+-0500&secure%5Bsession_id%5D=8559956d-bc38-4709-9845-0cff7a51a906&secure%5Btoken%5D=3bac3fa748d0f6de1fb434e0778eb6350f01fd0bc9277b7744a7a5f02932321d&format=llm_user) ## Mimecast Advanced Email Security Integrations - [MailStore Server](https://www.g2.com/products/mailstore-server/reviews) - [Microsoft 365](https://www.g2.com/products/microsoft365/reviews) - [Microsoft Outlook](https://www.g2.com/products/microsoft-outlook/reviews) - [Microsoft Teams](https://www.g2.com/products/microsoft-teams/reviews) ## Mimecast Advanced Email Security Features **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 - Filtering Functionality - Quarantine - Outbound Email Monitoring - Advanced Threat Intelligence/Protection - Archiving - Reporting **Maintenance** - Auditing - Allow and block lists - Compliance - Archiving **Detection** - Data Exfiltration Detection - Activity Monitoring - Real-Time Detection **Agentic AI - Secure Email Gateway** - Proactive Assistance **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 (572 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)