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Exchange Server and Reverse Lookup

By Brandon Jackson ·
We are having a problem with reverse lookups on our exchange server. As background (names changed to protect the innocent), our internal name of our exchange 5.5 server is "" (x is substituted for company name). We have a PTR record pointing our mail server's public IP address to Everything works fine unless another company requires reverse lookups. In this case, the email message shows as being sent by exchsvr, but the reverse lookup on the IP comes back as mail1. When that happens, the other company treats our mail like spam. We want to protect our internal naming structure from being public knowledge. Is there a way for Exchange to specify in its header that mail is coming from mail1 as opposed to exchsvr? I am sure you can do it, I just don't know how. Thanks!

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by BFilmFan In reply to

I think you mean the Internet Mail Service.

Details for that are here:

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by Brandon Jackson In reply to Exchange Server and Rever ...

The article explained some concepts, but not really how to deploy this in a 5.5 enviroment. I also didn't think that I would have to implent virtual SMTP servers for this. I thought there was a routing or addressing setting somewhere in Exchange Admin. Any ideas?

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