Thanks for correcting me Tech.

I obviously missinterpreted the help file…

MS Outlook or Exchange clients are automatically protected by avast! and there is no need to set anything. To protect other e-mail clients, like Outlook Express or Eudora, it is necessary to change some settings to make the mail protection fully functional.

But then it also goes onto say…

The mail protection wizard works with these mail clients: MS Outlook, Exchange, Outlook Express, Eudora, Pegasus Mail, Netscape Mail, Mozilla Mail, and IncrediMail.

It’s obviously past my bed time ;D