Comment 4 for bug 376523

I just tried with my gmail account on IMAP. I was able to configure it and get it to find the authentication types, suggesting it was using the proxy, but it wouldn't download folders or mail. No error, just continuously trying to connect. I'm not sure if that's the proxy being ignored or if the connection is being blocked by the proxy (as it does filter traffic like personal email).

I then disabled the proxy and attempted to get authentication information. It failed on the "Sending Email" tab when I clicked the "Check for Supported Types", with a message to the console:

    Host lookup failed: smtp.gmail.com: Name or service not known

so it seems like everything else is using the proxy settings. Only Google Calendar for me is affected.