- It resyncs way faster when you open the app, and uses a lot less data (JMAP is so much more efficient).
- Moving between messages is quicker. With Mail.app there's often a slight lag between clicking a message and it rendering. In Fastmail, it's usually instant.
2. It's more powerful. We provide the best standards support out there, and are also working to make the standards better. But there's always going to be more that we can do when we control both the server and the client. With the Fastmail UI you can: - Add private memos to emails
- Mute conversations to ignore replies
- Pin important messages to the top of your inbox
- Schedule messages to send in the future (and not need your laptop to be online then for it to work)
- See related emails when you open your contacts.
- Add events straight into your calendar
- And much more (https://www.fastmail.com/features/).
3. It's got much better search. (Yeah, this is kind-of just "more powerful", but I'm calling it out because search sucks in most email clients0.