I am trying to add a gmail account to Thunderbird that is already hosting several gmail accounts. No matter what I do, I can't get Thunderbird to recognize the password. I admit, I got is wrong a few times, but I did get the right one, and it was typed in perfectly several times, as well as copy and pasted. The password worked fine to log into the account directly, but not into Thunderbird. I tried changing the password, and that did not work either. I have tried adding this account in Windows 8.1 as well as Ubuntu 14.04, and the results have been the same. In Ubuntu, I tried adding another account I needed added, and that went without a hitch. The only think I can think of is the address I am trying to add is linked to a email address for a website being transferred to me that is hosted by Yahoo and its business mail. I tried adding the yahoo account directly, but I add the same issues with passwords, but I suspect most of you know that is because Yahoo is simply sucking more and more in an attempt to become irrelevant.