ML,
I think you are referring to Pegasus Mail by David Harris. Pegasus supports the standard operations: SMTP,POP3 and IMAP, as does Avast.
At this time, Avast does not support multiple SMTP addresses, however, it will scan ALL outgoing email clients provided that you asked it to do so in the Email Wizard.
The Avast Team is completing a list of new features to be included in the next major release of avast. Please feel free to give comments and/or suggestions of what you'd like to see there. Thanks!
• Support for UPX, BZIP, AsPack and other EXE packers
• Support for ACE, ARC, LHx and other file packers
• Enahanced support for CAB archives (speed optimization!)
• Support for multiple smtp servers in the Internet Mail provider
• Enhanced mail heuristics – rules/exceptions (iframe etc.)
• Lightweight support for Windows/MSN Messenger, ICQ, Yahoo Messenger, AIM, Trillian
• Leightweight support for ActiveSync
• Higher scanning speed on NT/2K/XP by using async IO
• Lower memory consumption of ashServ.exe
• ashMaiSv under NT+ running as a service
• Integrated cleaner for most common worms
• New licensing scheme (.lic files)
• Ability to manipulate running scheduled tasks (pause/stop...)
• Ability to start/stop VRDB generation on-demand
• Minimize page faults in ashServ and ashDisp (performance optimization)
Good Luck