LinuxQuestions.org - sendmail smtp local domains issue

Hi guys!

I think this problem is kind of common ones, but search showed nothing...

I have a debian box as a web-server. And when php script sends mail to a domain, that hosted on this server (I mean site with that domain name), sendmail tries to receive mail, ending up with "dsn=5.1.1, stat=User unknown" in log.

I've found that one of IPs of my box resolves to that domain, and sendmail -bt showed:

Code:

sendmail -bt

Enter <ruleset> <address>

> $=w

[1.2.3.4] - first IP of my box

[1.2.3.5] - another one

localhost.localdomain

localhost

thatdomain.tld

[localhost.localdomain]

[127.0.0.1]

[thatdomain.tld]

So the question is: I don't need a web-server to receive any mail, that is done on other box. How can I make sendmail to relay everything?

Thnx in advance!