After deleting a lot of emails and the folders in which these emails were stored, after deleting one folder, I got a message on the lower right of my screen saying that the operation failed. That message came and went for what seemed like 2-300 times. I don't remember the text of the message. Now I can no longer connect to the mail server. When I enter my password, the message at the lower right says "jerrytex@swbell IMAP: Sending login information ..." After a few minutes, a popup up window appears which says: "Login failed ? Login to servier imap.mail.yahoo.com failed Retry Enter New Password Cancel (<-- these are buttons)" Sometimes multiple copies of the above pop up window appear. I then enter Retry - after several minutes, the same window appears. When I kill Thunderbird, that same window appears one more time. I can access my mail on the web (mail.yahoo.com) just fine. I have tried re-booting - it still doesn't work. I am running Windows 7 on a Lenovo laptop. Any suggestions?