I use Thunderbird on Windows 7 but my employer (who won't support Thurderbird) use Outlook instead. I recently started having the following problem: I delete messages in Thunderbird (i.e. I put them in Trash and then empty trash) but they do not get deleted from my email account, so I still see them in Outlook until I delete them there too. Obviously I cannot keep doing both and my mailbox gets full in a matter of months! I have not changed any settings in Thunderbird, and have already tried deleting my Trash folder in case it was corrupted (I use imap, so it got reinstated automatically). Any suggestions as to what may be causing this glitch?