We have Exchange 2003 upon a SBS 2003 server.
SBS 2003 server has SP1 patch
Exchange 2003 has SP1 patch.
In the Exchange 2003 queue, we have unwanted SMTP sessions, as many as ~20 or so, some of these obviously, are spammers, by their domain names (0733.com, 1-800eatshit.com, etc.). I know these are spammers, and they have probed our Exchange 2003 server to exploit.
How do you prevent these SMTP sessions from comming into the Exchange 2003 server?
I have been "freezing" the smtp session, then deleting the messages in the session.
Would an appliance gateway or an email appliance help in this?
Are there any books or other papers on preventing this unwanted SMTP spammer sessions?
Thank you for your time.