I currently have to Gmail addresses linked to Thunderbird. Try to add a third one today and it cannot be done. Spent an hour messing with password issues. Even changed my Google password and came back and try again, no luck. It asked me to sign into my Google account in his email address are listed I click next enter the password it then brings up a verification letter box. When you enter the letters the password disappears, reenter the password the letters disappear, reenter the letters the password disappears and so on. Spent over an hour messing with this with no luck. Any help would be greatly appreciatedW When Thunderbird works I like it. But that's not the case today!