I need some Exchange advise. We have an exchange server 2003 that is internal. 192.168.*.* This server also has an external interface on it. We would like for all e-mail to be relayed through another external server. This external server is actually the mx record for our domain, and does all content and rule based filtering through Trend-micro IMSS. The problem we are running into is that we see the external interface on the internal exchange server is sending out mail. And since it is not registered as the mail record. WE are getting blocked as a spam source once a week. (we are not an open relay from the testing I have done.)
Here is more information:
Under our Default SMTP Virtual server Properties.
IP address: All Unassigned <-- Should this be set to the Internal interface IP Address?
Access TAb: Relay Restrictions Button, Radial clicked for, Only the list below, in this list we have multiple entries. some IIS servers that are external, some internal groups defined by our IP internal address, and a couple of IP's I have no idea what they are.. This is also a red-flag for me right now. We also have Allow all computers which successfully authenticate to relay checked.
Under the Delivery Tab: FQDN of the Internal server.
In our Routing Groups:
We have forward all mail through this connector through the following smarthost. The external server's IP is entered in [serverip].
How to I set up our internal Exchange server to relay mail to the external server that has the mx record for the Domain. Any help would be appreciated..