Gmime 3.0
I'm hoping that we can use this ticket as a tracker just for the conversion to GMime 3.0.
I know that #154 (closed) and #566 (closed) were both about GMime 3.0 support, and were both closed as duplicates of #6.
However, #6 is locked due to contentious edits, and it seems like a much bigger set of tasks than just converting to GMime 3.0.
I don't want the size of that task to block us from getting Geary ported to GMime 3.0, because Geary is one of the two remaining blockers for my ability to drop GMime 2.6 from Debian. GMime 2.6 is not really receiving much upstream love any more, and i'd hate to see geary tied to a stale library.