Re: not answering MX record

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In news:0BDB7E36-5E9B-4007-83AC-7AF10105462A@xxxxxxxxxxxxx,
Alfredo <Alfredo@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
Thanks for answering!

Well the Linux box that runs a Sendmail is in my internal network and
it will send an e-mail to some of the internal accounts that reside
in Exchange, in fact they're going to sent to
somebody@xxxxxxxxxxxxxxx and as far as i understand the sendmail will
query the internal DNS server for a MX record in order to try a SMTP
connection afterwards.

No - it doesn't need to do that. MX records are so that the world can find
your mail server when they know only your domain name. You really don't need
MX records internally.

If you want your Sendmail server to send mail through your Exchange server
(to internal recipients and Internet recipients alike) all you need to do is
allow it to relay through it.

Open Exchange system manager, find the Virtual SMTP Server, and go to
properties. Then click the Access tab click Relay Restrictions - set it to
"only the list below" and add the LAN IP addresses (or range - I don't
recommend that) that need to relay mail through it.

Then on the sendmail box, set it to send out all its mail via the FQDN of
your Exchange server.

Does that accomplish what you want?



I've run dnslint and none of the AD integrated DNS servers did answer
the MX record.

Thanks

"Lanwench [MVP - Exchange]" wrote:

In news:0E80794A-DC7B-473B-84DF-01C426E56E17@xxxxxxxxxxxxx,
Alfredo <Alfredo@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
Hello there, everybody, I have my internal DNS servers integrated
with AD, there are four MX records on my forward zone for the
Exchange Servers.

If I understand your setup, your internal DNS doesn't need to have
*any* MX records for your Exchange servers.


Now, I have some Linux boxes running sendmail that
need to resolve the MX record from my internal DNS servers. The
problem is that my MX querytypes (with nslookup) are not giving any
answer, the other querytypes (NS, SOA; etc) do answer.

Any ideas?

Thanks

Are these Sendmail boxes internal to your network? If so, why would
they need to query your internal DNS for MX records for your
internal Exchange server? What do the Sendmail servers do?

If I've misunderstood, please feel free to correct me.



.

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