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Exchange Routing

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by rbarton

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In an attempted to be a good network administrator, I want to block relay from my Exchange server. But, since I have DB program on our web server that sends emails to registered people, I have to becareful. If I try to open relay to just our web server it fails. I am adjusting routing on the Internet Mail service. I'm running Exchange 5.5 on a NT 4 box (sp-6). Do I need to set more than one setting? The setting I am trying is under properties of the Internet Mail Service; Routing > Routing Restrictions > Hosts & Clients with these IP Addresses. Ideas?

4 replies

by dawsopolis

Ewwww, i have this very same problem. Users of database application cannot email from that app. without the relay on...OR you have to add EVERY single email address of clients to your Address book.

Perhaps block the domain of the mail server bouncing mail off you. But I've tried that too, it would be a full time job to keep up with them all, i gave up.

by rbarton

I have to block relay while allowing the emails from the web server. What I set, should work. As fas as I can tell.

by rbarton

Solution:

Under the IMS-Routing-Routing Restrictions, select "Host and clients with these IP addresses". Then, here is the trick, list the IP address of the host you want to relay and a subnet of 255.255.255.255. The subnet was the trick and ittook some searching on TechNet to find that out. If you have a range of IPs, the mask would be 255.255.255.0. I hope others find this and it helps.

BobMan

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