JMAP support

[BuZZ-dEE]

https://jmap.io/
https://tools.ietf.org/html/rfc8620
https://tools.ietf.org/html/rfc8621

[polyjitter]

Came here from a search, going to comment here so there isn't a duplicate opened. I believe what OP was suggesting, and what I would like to see too, is to Nextcloud Mail support JMAP protocol communication for external mail accounts (esp. Fastmail accounts), as overall it is a much nicer and cleaner protocol.

There is also the possibility they wished to see mail-in-a-box support JMAP protocol for self-hosted email servers, but as this is not a Nextcloud tool, I think this would go to their issue tracker instead.

EDIT: Correction - it appear hosting support for JMAP would go towards Dovecot. I mmay open it myself, but I would suggest OP open a ticket over at @dovecot. Maybe core repo?

EDIT2: Dovecot has no issue tracker. Unfortunately this means it would not be possible to request hostable JMAP be implemented anywhere in the Nextcloud tooling chain.

[ChristophWurst]

Well and even then it's just two provider that support this, right?

We'll limit ourselves to IMAP for now. If we reach the state where we have other useful things done that 90% of our users will actually use, we can reconsider JMAP support.

[RokeJulianLockhart]

Of note, there is a Thunderbird ticket for JMAP support with 25 upvotes (an unusually significant amount) at https://bugzilla.mozilla.org/show_bug.cgi?id=1322991#c0, so there's definitely ecosystem interest.