Software

Ask something
Discussion Locked

SMTP Relay

0 helpful
5 replies

by a_tank

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.
I have inherited an email system that I am having trouble with. They have Exchange 5.5 set up on there LAN. All mail is forwrded to an SMTP server, running IIS 4.0, that sits outside of there LAN which is used to forward messages for the Exchange server. I am now receiving emails saying that this machine is forwarding Spam. Sure enough, the Mailroot\Queue is full of junk mail. As I am unfamiliar with IIS, how can I restrict this from happening. The IIS machine has the latest service packs. The Eschange Server does to, although the machine itself has only service pack 5. Any help appreciated.

5 replies

by [_rick_>

Remove the IIS Server with the SMTP gateway and install an Exchange 5.5 server with the IMS Connector. (If you already have one - you can install another in a different site).

The Exchange server can then be configured to restrict any relaying except from the Internal system.

If you don't want to use Exchange, then I recommend using a firewall which has SMTP relaying capabilities built-in or use a SENDMAIL product (either for Linux/Unix or for NT). These will provide you with better security and be more robust than the SMTP gateway found in the IIS environment.

This discussion is closed to new replies.