Beyond Mastodon and Bluesky: Toward a protocol-agnostic federation
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votes
https://fastmail.blog/2018/12/27/jmap-is-on-the-home-straight/
Highly recommend to read the Dec 2014 post on what JMAP attempts to solve: https://fastmail.blog/2014/12/23/jmap-a-better-way-to-email/
UI changes on FastMail, making use of JMAP: https://www.fastmail.com/help/guides/interfaceupdate-2018.html
The JMAP spec and documentation: https://jmap.io/