I recently migrated my Tbird from a Vista PC to a W7 PC using Mozbackup. Transfer was fine with all the settings transferred apparently correctly. But now I can receive emails but not send them. Sent emails show in 'Sent Items' but are not received the other end. Also tried the migration using the Beta 1 version of Mozbackup and also Windows Easy Transfer with the same result. IMAP and POP3 accounts are both affected. Neither can send emails. I get no error messages nor any bounceback. Found on one forum that AVG can block outgoing emails so altered the AVG settings which seemed to solve the problem. The next morning the problem was back. I uninstalled AVG completely but it made no difference. I do have MicroSoft Sec Essentials but the problem was there before that was installed. Using the BT Home Hub 5 on BT Infinity broadband. It can't be the router though as the old PC was sending emails fine. Although I did have the suspect AVG settings, removing it has not solved the problem. The outgoing email settings seem to be fine. Any thoughts? Simon