On Thu, 11 Nov 2004 08:14:42 -0700, Darren Haun <dhaun@xxxxxxxxxxxxx> wrote: > http://www.MSExchange.org/ > > How do you set up Reverse DNS on your Exchange Server to reject messages > that don't correspond to the IP address/Reverse DNS entry. This will depend on what version of Exchange you are running. However, in Exchange 200x you will find a setting under your SMTP server properties -> delivery -> advanced. Please do note that by activating this setting the SMTP server will perform a RDNS lookup, but it will not reject emails based on the results of the lookup. > This tactic is usually used to block spam. Good luck! :) There are many better tactics to combat spam. How many mailboxes do you have? I am sure that we can come up with a better solution for you, especially if you find yourself spending a lot of time combating spam. ...D