Multiple Domains + mail server host greeting name


I have an Exchange Server 2003 which hosts 2 email domains ( &  

DomainA is our company's email account and DomainB is our hosted companies email account.  I had a feeling this would happen, when I did a DNS REPORT on it I received a warning that the "mail server host greeting name" is not mis-representing itself, i.e., the greeting host is showing as DomainA's MX record.  I have the proper MX records, & including proper r-dns records.  Can you "fudge" exchange so that it properly reports both MX records in the mail greeting host??


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It seems that your Exchange Server is Internet Front.

You should install a SMTP gateway between Internet and your Exchange server (eq. Linux with Postfix) and modify the MX (on Internet) for all domains you host to point to your SMTP gateway.
Lee W, MVPTechnology and Business Process AdvisorCommented:
Came across this recently in a group I'm a part of... not sure if it's what you're looking for:
Under the SMTP Connector go under Properties and on one of those tabs there is an Advanced button revealing a field where you can change the name to
2 email domains ( &  

>>warning that the "mail server host greeting name" is not mis-representing itself
why NOT mis-representing itself ?  surely you mean mis-representing itself ?

As to the answer.
A mail server can receive email from multiple domains if there mx records point to it.
The solution is NOT to use 2 different dns names for the different domain email servers, but the same

For    have a mx record
and for have a mx record     <<A again.

Both should point to the same domain, and the reverse lookup for the ip should also point to

Then the problem is solved.

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sdeblockAuthor Commented:
Thanks for your responses.

It seems as though I have the server created correctly with proper RDNS and MX records.  I was worried that outbound email from DOMAINB would have issues with some mail servers if it was responding with a mail server greeting name of DOMAINA.

Per DIEPES last reponse, that's the exact configuration I have now.

Please let me know if you have any other thoughts - thanks!
you can read up on SPF  sender policy frame work, that is a way to add dns records for domainA and domainB that appoints your mail server as a legitimate sender for both of these domain.

But is is not used/checked widely by mail servers.
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