Hosting a domain at Google? Please add XMPP SRV records.
Are you one of the many people who has a domain hosted at Google? This is the whole thing where you get Gmail for your domain, and XMPP (Jabber) chat, and all of this. If you aren't, great! This post is not for you. Carry on.
If you are, please make sure you have SRV records in place for XMPP. Without them, people who are using other servers can't talk to you! This is because their servers don't know who to contact with chat messages.
I've started running into this as a result of starting to move my mail and chat activity away from you-know-who.
This is a particularly annoying problem since communications between hosted domain accounts and gmail.com accounts will work just fine. It "knows" they are local and can route the messages properly. It's only when the rest of the world tries to interoperate that things then break.
They seem to have a help page about this. Don't expect that link to work once my post is more than about six months old, though. That's the half-life of most things out there these days.
Thank you for your cooperation. Every little bit helps loosen their death grip on the Internet.