We had a bad experience with ejabberd pre-release version 3 (had an intern spend the entire summer on it, and I put some time in too): http://blog.fastmail.com

We had a bad experience with ejabberd pre-release version 3 (had an intern spend the entire summer on it, and I put some time in too): http://blog.fastmail.com/2012/09/26/one-step-forward-two-steps-back/ http://blog.fastmail.com/2012/09/26/one-step-forward-two-ste... Honestly Prosody looks the best. We were planning to switch to it when async login support and scalability to thousands of domains was stable... but that was 2 years ago and it never quite materialised - and now DJabberd is so far behind in support for "standard XMPP" and the interoperability of the remaining servers that we just had to give up. I argued strongly against it, having spent so many bloody years on making this thing work - including tons of patches to DJabberd and some EJabberd hacking as well - but the numbers didn't lie. Better to spend our time on exciting things like the currently-in-testing cross-domain support for Cyrus IMAPd and reverse ACL lookup that will make the LIST command blindingly fast even on big servers. I'm hoping to be able to say two steps forward, one step back this time instead :)