Have you ever had trouble with Thunderbird disconnecting while Thunderbird is trying to move the email to the sent folder? The second entry from the bottom of that forum conversation has the answer to the problem.
Posted by TheIdeaMan at April 13, 2004 01:43 PM | TrackBackPlease note: Comments will not appear immediately. Your comment will appear upon approval by the blog's editor. We had to implement this to decrease the amount of spam that our site receives. Please forgive the inconvenience. We are looking into other, friendlier options.