I have had this server configured for a while and was receiving e-mail, but today I have been having many screaming people tell me that they are not getting their mail. I have tested this and yes, I cannot send e-mail to this server. The MX record is pointing to the correct IP and I can telnet to port 25 without a problem.
What would you suggest I look at to find my problem?
Exchange 2003 with SP2 running IMF.