sendmail 8.9.3.1 and sending to multiple domains

[Rick Garland]

Hi all:

Got the above sendmail version on HPUX 11.00. Trying to setup to mail so that the mail being sent will be routed to the appropriate smart host.

In other words;

mail destined for domainA will be routed and delivered through the smart host at domainA. mail for domainB will be routed and delivered through the smart host at domainB. All other mail will be routed and delivered through smart host at domainC.

How can I?

[Sajid_1 · Accepted solution]

hi,

This may be helpful:
http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062909644

Doc ID - KBRC00008883

[Christopher Caldwell]

From a low level, stock sendmail picks how to route mail to different domains, based on the MX record(s) for for those domains. You set the MX records up in DNS.

If you want to override this behavior (and the sendmail host we're talking about is a gate or relay for the domains in question), use a mailertable entry like
a.com smtp:[name.of.the.smart.relay]

on HP-UX, use somthing like
makemap dbm /etc/mail/mailtertable < /etc/mail/mailertable

Don't forget to uncomment the mailertable rulesets in sendmail.cf

BTW, is this configuration, the host were on now generally appears as an MX for the domain in question (while the smartrelay doesn't).

[Rick Garland]

The system I am working with does not run DNS. So the MX entries are not available.

[Christopher Caldwell]

mailertable
a.com smtp:[1.2.3.4]
b.com smtp:[1.2.3.5]

Relay everything else to c.

BTW, mailertable should use anthing that's available to the resolver (/etc/hosts, DNS, etc.) as long as resolv.conf /nsswitch.conf are correct.

[Rick Garland]

I figured it was the mailertable setup but when I was trying that initially it kept going to the localhost. When I copied over a sendmail.cf file from another similiar system and made the necessary changes, it worked. So there was something not right in the original sendmail.cf file.

Many thanks for the assistance!