Can anyone tell me how to configure a Mail to get it work behind a proxy? It concerns just for a GMail account for the moment. Is there any special tips for other accounts or it is the same for all the ones?
It could be important to talk to your IT folks. Maybe they are specifically blocking GMail access. I last worked inside a proxy at a school, and those folks didn't want GMail used at all, and that was specifically blocked by the proxy server.
In that case, there's a few tips on this page that might help you out. http://www.ehow.com/info_12179892_gmail-mail-server-blocked.html