gravityburn, you need to turn off the "Internet Mail" provider. It is not meant to run on servers (especially mail servers). It's a client-only provider.
To protect your mail traffic (Exchange), use the SMTP 2000/2003 and Exchange 2000/2003 providers.
The Server Deployment Wizard should help you set up the protection (it's accessible from the avast group in the Start menu).
tmorg, do you also have "avast! Server Edition"? If not, could you please use a different thread in the proper forum category?
Thanks
Vlk