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From what I can tell, in all my searching and tests, if I set up my own jabber server (using ejabberd) I can not do s2s with TLS to and from google XMPP servers.

When I connect, the ejabberd log records:

I(<0.377.0>:ejabberd_s2s_out:365) : Connection established: XXXX.net -> gmail.com with TLS=false

Is it even possible to do S2S TLS with google XMPP servers?

samuraisam
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1 Answers1

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No, Google does not support TLS on server-to-server connections today, it was turned off some years ago. See for example this mailing list post.

It used to work, but there has been no official word on why it was disabled, or whether it might return.

MattJ
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  • An additional note: Since the change of Talk to Hangouts, Google no longer supports s2s connections **period**. – earthmeLon Sep 22 '14 at 21:58
  • Not quite true. Google still supports s2s. However messages sent to Google users that are using Hangouts get silently discarded. Try connecting to Google using a standard XMPP client, you'll find you can still communicate with users on other servers (as long as they don't require encryption - many do, since May this year). – MattJ Sep 23 '14 at 07:30
  • Thanks for the clarification. It is my understanding that they will be phasing out Talk and removing the functionality from Gmail, too. – earthmeLon Sep 23 '14 at 19:02