I am using Office 2003 on a Windows XP SP2 machine. I have had outlook set up so I can switch between email accounts depending on which office I am in (I have 2 offices in 2 different organisations so different proxies which I change using proxyswitcher).
I have outlook set up to get emails from 3 different POP/SMTP accounts.
I recieved an email from one that was at the time set up for the wrong send SMTP address and it requested a send reciept which I unthinkingly said ok. Ever since (and I'm not sure if this is coincidence or cause) Outlook keeps trying to send an email, and comes up with the "Sending message 1 of 1" in the status bar periodically (this doesn't seem to be linked to the usual send/recieve either). Eventually it generates an error stating the transmission was interrupted and then repeats every once and a while. My theory is that the read reciept is stuck somehow but I can't for the life of me figure out how/where. There are currently no emails in the outbox or sent items box.
My second theory involved assuming that read reciept thing was a coincidence and it was some kind of malware doing this. I scanned with ad-aware and with my virus scanning software and it came out clean.
Any thoughts/ideas/advice would be greatly appreciated.