I am operating an Exchange 2003 environment. Recently I experiencing a bigger spam attack.
I have heard that if I apply a Spoof record in the DNS setting or perform reverse dns using Exchange server it would reduce the SPAM attack.
Do I need to register a Spoof record or do I need to perform reverse DNS on incoming mail with server?
What do you think?
Any other suggestions would be appreciatted.
P.S.: The server is using the newest NOD32 for Exchange for Antispam and etc...