I use 2 different gmail accounts for different purposes. I get mail for AccountA via IMAP on Thunderbird, no problem, and have for years. For over a year now I've been unable to collect mail for my second-string address, AccountB, on Thunderbird, and have had to get it in the browser. I've finally decided to do something about this. I removed AccountB from Thunderbird & set it up again. I'm using the exact same settings (in Thunderbird and in Gmail) that I do for AccountA, the only difference is the password. I've double-checked the password, too. But when I try to connect, I get a pop-up: ---------- titled: Enter credentials for AccountB@gmail.com on imap.gmail.com [a very long URL which I've copied & saved] page from Google: 400. That's an error. The server cannot process the request because it is malformed. It should not be retried. That's all we know. ----------- Thanks a heap, guys! Is this problem coming from Thunderbird, or from Google? What do I do now? Thanks, MEC