For the record this feature is a pretty core part of many things in XMPP, and is enabled on 98% of this sample of 670 servers: https://compliance.conversations.

For the record this feature is a pretty core part of many things in XMPP, and is enabled on 98% of this sample of 670 servers: https://compliance.conversations.im/test/xep0163/ https://compliance.conversations.im/test/xep0163/ The ones without it are mostly special cases (e.g. gmail.com is on the list, of course).