Often, like many others in this forum, I receive message that TB is unable to save a message in the drafts folder while I am composing a message. I always click "Retry" because I want the draft saved on the server. I want it on the server to which may account is imapped, because I might resume composing the message on another computer or my phone. Retry usually works. The message gets saved. But when I successfully send the message, the draft message saved with Retry is not deleted. If I don't need to use retry and the draft is saved automatically without my intervention, the draft message is deleted.