OK I'm using Thunderbird 15.0. it takes my default email just fine. (att.net) But when I add my second email address, it tells me that it dose not "recognize" it. I have always had both email accounts on Thunderbird, but now it's just being a pain in the ass. I registered both accounts at my att site, but Thunderbird only recognizes mt default att.net account but not my second att.net account. Can someone Please help me with this issue??