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05.01.2008 at 03:47PM PDT, ID: 23370328
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Configuring DNS/Sendmail so that e-mail that matches the internal domain name will resolve externally.

Asked by truacc in SendMail Email Server, Fedora Linux

Tags: Fedora, Fedora Core, 7, sendmail/mx issue

I am having problems sending e-mails via sendmail to my external domain (i.e. - mydomain.com).  I believe this is because the external domain name matches the internal domain name.  E-mails can route to any other domain just fine and this used to work until I configured a primary DNS server (BIND).  

How do I configure BIND or sendmail so that e-mails to mydomain.com don't try to resolve internally?


Here's the error message I am receiving from /var/log/maillog when sending e-mails to mydomain.com;Start Free Trial 
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May  1 15:20:38 server-01 sendmail[1344]: m41MKcsD001344: from=root, size=48787, class=0, nrcpts=1, msgid=<200805012220.m41MKcsD001344@server-01.mydomain.com>, relay=root@localhost
May  1 15:20:38 server-01 sendmail[1345]: m41MKcl5001345: from=<root@server-01.mydomain.com>, size=49094, class=0, nrcpts=1, msgid=<200805012220.m41MKcsD001344@server-01.mydomain.com>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
May  1 15:20:38 server-01 sendmail[1344]: m41MKcsD001344: to=user@mydomain.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=78787, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (m41MKcl5001345 Message accepted for delivery)
May  1 15:20:38 server-01 sendmail[1347]: m41MKcl5001345: to=<user@mydomain.com>, ctladdr=<root@server-01.mydomain.com> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=169094, relay=mydomain.com, dsn=5.1.2, stat=Host unknown (Name server: mydomain.com: no data known)
May  1 15:20:38 server-01 sendmail[1347]: m41MKcl5001345: m41MKcl5001347: DSN: Host unknown (Name server: mydomain.com: no data known)
May  1 15:20:38 server-01 sendmail[1347]: m41MKcl5001347: to=<root@server-01.mydomain.com>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=80354, dsn=2.0.0, stat=Sent
[+][-]05.01.2008 at 07:26PM PDT, ID: 21484201

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[+][-]05.04.2008 at 08:28AM PDT, ID: 21495943

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About this solution

Zones: SendMail Email Server, Fedora Linux
Tags: Fedora, Fedora Core, 7, sendmail/mx issue
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Solution Provided By: jar3817
Participating Experts: 2
Solution Grade: A
 
 
[+][-]05.05.2008 at 09:31AM PDT, ID: 21501143

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[+][-]05.05.2008 at 10:36AM PDT, ID: 21501580

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[+][-]05.05.2008 at 01:15PM PDT, ID: 21502635

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