MX records and multiple IP addresses

[Barry Margolin]

In article <29057D45C11BD211B68600805FEAA1EE04182734 at nihexchange3.nih.gov>,
Keller, Richard (CIT) <keller at mail.nih.gov> wrote:
>We have a client who is requesting the following:
>
>They currently have an email server with an MX record pointing back to it.  So
>let's say the record is mailserver.nih.gov. IN MX 10 mailserver.nih.gov.  They
>wish to have another email server, mailserver2.nih.gov, that will be on the same
>IP address, but will be used for IIS web access to exchange.
>
>If they are registering mailserver2.nih.gov to the same IP address as
>mailserver.nih.gov will it need another MX record that points to mailserver2?
>In other words, mailserver2.nih.gov. IN MX 10 mailserver2.nih.gov.  Or, should
>the MX record point back to mailserver.nih.gov.

Either way should work, as long as the machine recognizes both names as
referring to itself.  This depends somewhat on the mail server software
that the machine is running.

>In addition, will multiple MX records on the same IP address cause any kind of
>problems routing e-mail or with name resolution?

No.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
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