The ability to have multiple accounts listed under one user account, and to have all settings preferences synced between devices upon login. Integrates seamlessly with email providers. Easy to setup, albeit a non-issue for me. The dev team is very open to feedback and implements changes/bug fixes promptly. Been an avid user for years, and I don't see myself leaving anytime soon.

It has been tough to find a mail application that combines all of my favorite options into one I've been using three different types of programs to be able to securely encrypt messages, to snooze messages, to sort them in a special way, and have a unified inbox. And all of these things are included in Canary Mail. It was especially important to me that it was easy to sign messages and encrypt/decrypt messages and Canary Mail handles that perfectly. It implements the PGP signature is very easily. And the integration has been incredibly easy into my workflow. I must use this app on all of my devices every day without any thought about it. Their customer support has been excellent to when I ever had a question they have answered quickly and with great informaiton.

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