Bill F

I started using Astro on macOS and iOS as a Mail.app replacement this summer and after zapping my Inbox and staying on top of email with Snoozes, haven't looked back. Pros: Undo Send, Send Later, post-to-Slack and Slack-search integration, the new Calendar/Agenda view is cool, too Cons: None--it has feature parity with the built-in Mail.app

I switch to Astro this summer, zapped my inbox and haven't looked back. Thanks Astro! Pros: Amazingly responsive customer support! Undo Send - go back and include that attachment! Send Later - don't announce you email late at night. Cons: None. I have not hit any major bugs, and sometimes they have turned around a bug fix in a week.