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Internal and External NIC's

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Internal and External NIC's - 21.Aug.2007 12:40:52 PM   


Posts: 9
Joined: 11.Jun.2007
Status: offline

I was wondering if anyone could point me in the right direction with a problem I am facing with our new Exchange 2007 set up?

Currently, the server  has 2 NIC's - one connects through our router and onto our ISP's network with a static IP address assigned to us by our ISP, making it visible on the internet.  The other has a private static IP address that we have assigned that makes the server accessible internally for our client computers.

This all seems to work fine for receiving messages and logging into Exchange either internally or externally of our building.

However, when trying to send external-bound messages, we are getting 'Relay Access Denied' messages.  After looking into this a bit deeper, it seems that it is trying to send messages out using the Internal NIC rather that the External, which is obviously not possible.  Messages sent internally all work fine.

Is there a way of telling Exchange to send messages that are not destined for adresses within our domain through the external NIC?

I hope I have expained this clearly??

Thanks for any help anyone can give me with this....

Post #: 1
RE: Internal and External NIC's - 25.Sep.2007 12:54:57 PM   


Posts: 4
Joined: 25.Sep.2007
Status: offline
I don't think the issue is the NIC I believe maybe due to the send connector do you have your FQDN for the external domain listed there?  If your ISP has not setup your static address of your server with an "a" record and the mx record of your server with that FQDN then when you send to the external world they will think your are attempting to relay and block you.

(in reply to Mark_FCS)
Post #: 2

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