We are using Server 2003 and Exchange 2003. We also have Avast 4.8. A couple of days ago we were notified that we were blacklisted by Lashback. Looking at the Internet Mail scanner in Avast it shows mail from Ibrahim Yusop ibmyusop@sify.com as coming from our server so I figure he hacked in somehow. The Outlook/Exchange Scanner is not running and says “The provider is waiting for a subsystem to start”. How do I get the Exchange scanner running and how can I get rid of this spammer? Any help would be appreciated as I just got thrown into trying to solve this and not real server literate. Thanks.
it sounds like you have an OPEN RELAY server
check with this site: http://www.mxtoolbox.com/diagnostic.aspx
fill in the public name of your mailserver or the public IP.