k9mail/k-9 — pull request #300 by dzan (2013-04-20 16:04:34+00:00)
Title: Change smtp+tls default port to 587.

I noticed this when trying to connect to an outlook.com address. It seems like an error in our source since we indicate ourselves it should be 587:
https://github.com/k9mail/k-9/blob/master/res/xml/providers.xml#L66

Strange there were no complains? Just close if I'm mistaken.