Comment 3 for bug 1157735

Geary today doesn't handle connection errors very well. We have that ticketed here:
http://redmine.yorba.org/issues/5281

In your debug log, I'm seeing a number of "No address associated with hostname" errors. This typically indicates a DNS problem.

A couple of things to try to resolve this:
* Check /etc/hosts to see if there's any malformed entries.
* Switch to a different DNS server
* In Network Manager delete your connection and recreate it (this resets all the connection settings.)