Have you tried removing & readding the account?

"Dica" wrote in message
news:EmaQg.33795$E67.8396@clgrps13...
outlook has been running fine up to a week ago when it started leaving
messages on the mail server and sending replie messages from a second
email account (not the one originally sent from). i do not have the option
for leave messages on the server on and the email account outlook wants to
reply with (the wrong one) isn't the default. are there settings somewhere
i can update to correct this? i'm running outlook 2003, sp2.