At this point I don't know if someone has hacked my account or if my laptop is infected with a virus.
- there is nothing in my Sent folder for this e-mail (my Sent folder is on the server, so that doesn't prove it wasn't sent from my laptop)
- there are also several "Returned mail: see transcript…" items in my Spam folder (not sure why it's in the Spam folder, since the body of the message does not include the original message text; however it does include the subject)
- at least one of the e-mails mentioned in the To-list of one of the "Returned emails" in my Spam folder was an e-mail address that I don't have in my address book (Personal address book, Contacts and Collected Addresses) in T-Bird; however when I went to the web-based client, composed an e-mail and typed in the start of that e-mail address, it auto-completed it for me
- this makes me think pretty strongly that it was my account that was hacked, and not my laptop being infected – does that sound right?