@hllizi @aronkvh @mattburgess I have seen this pattern with XMPP on Facebook chat.
I have seen this with people asking other people to get on Gmail (because gmail -> gmail end up in spam less often (I wonder why!? /s))
Heck I've seen this with Funny SMS ASCII-images that only worked correctly on other Nokia phones.
I don't really care if you don't find it plausible.
@claudius @aronkvh @mattburgess and I don't care what you care about, but I didn't think that this was the issue.