Eddy
12
UseDefaultSmtp 0
If you have just more than one SMTP server = 0; Just one: 1
Does it make any difference if you change that?
If not, change it back ofocurse.
Technical has a lot of info about the settings
http://forum.avast.com/index.php?board=2;action=display;threadid=1647;start=msg10267#msg10267
Perhaps setting the mailscanner section to default and setup the mail as you would do from scratch will solve it.
Just thinking out loud here, so don’t take my word for it.