MX Record Sub-Domain Problem

[Barry Margolin]

In article <a9nddf$nkh at pub3.rc.vix.com>,
William Benneke <william.bennecke at ey-as.com> wrote:
>If I understand the meaning of "split DNS" correctly, then the answer
>is "yes".
>We have 2 DNS servers for the outside DMZs (internet) and 2 different
>servers for the inside (intranet) LAN. To resolve external names you
>have to query the
>outside DNS servers. 
>
>The dig response is correct. It shows what is in the "db.ey-as" zone
>file.
>I am interested in the zone file for db.cgeygoa, which is on the same
>DNS server (ns1).
>
>We are also doing NATs with our IP address to hide our LAN
>information.
>
>So, the problem remains. I would like to have clients email to a
>sub-domain of
>cgeygoa.com. Example:
>user at sub.cgeygoa.com and have that go to a mail server in the
>"ey-as.com" domain

Please post the entire db.cgeygoa zone file.  I think your original message
didn't have the complete file.

>> That will make it difficult for someone to send mail to users in this
>> domain.  But since your server doesn't seem to be hosting the public
>> version of the zone, it may not matter.  The important entries are the
>> chntmail01 and chntmail02 A records in the external version of the domain.
>> MX records are often not used internally within your LAN.
>
>I was not aware that MX records are not often used internally within
>your LAN.
>When I first started trying to solve this problem I setup the MX
>record in my
>LAN DNS servers.  It looked fine, by my Lotus Notes server (handles
>all mail) was not able to route mail to user at sub.cgeygoa.com.  It
>comes back with
>"no route found to domain sub.cgeygoa.com".
>This led me to believe that I would have to setup the MX sub record in
>the
>external DNS servers.

If these addresses will only be used internally then you only need to have
the MX records on the internal servers.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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