erebion

Sure, not widely supported, but if you use clients supporting it, it is great. Blazingly fast, while IMAP is always slow.

Also, Thunderbird is working on JMAP support: https://blog.thunderbird.net/2025/09/state-of-the-thunder-mozilla-connect-updates/

My mailserver runs on Stalwart. Whatever it does works for me. I haven’t yet had to change the defaults. It’s also very easy to set up and requires next to no maintenance.

(It also does JMAP, which is like IMAP, but modern and efficient)

Forgot to mention that it needs really low resources. Meanwhile Matrix feels sluggish even on pretty recent hardware. Seems to be a fundamental issue with how it’s designed.

I thought I know all chat systems by now, but that one is new to me. :D

Does it use some open protocol and has different clients to choose from?

It always depends strongly on the use case, so I don’t mean the following as “use this”. Matrix has got me back into XMPP. And I was suprised how much that has improved. Ten years ago it wasn’t usable on mobile devices and people used OTR (I can re ommend trying it again to everyone who’s used it years ago and hasn’t tried it since), now I just use it for my day to day communication with family and friends. My family does not know the term “XMPP”, but they know they have to use an app called Snikket to reach me and they’re pretty happy with the reliability. However, people have different neeeds and threat models, so I am not recommending it blindly.

Looking at all the issues Matrix has had for years and is still struggling with, I’m not suprised people prefer to use something else. I’ve been using Matrix since 2017 and I feel like things don’t improve much, unfortunately.

The only winning move is not to play.

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