Home Linux Community Forums Linux System Administration Web Management Trying to configure sendmail in Debian

Trying to configure sendmail in Debian

Link to this post 11 Mar 13

I'm trying to configure sendmail on our Debian Linux server to send mail, using our Exchange server as a relay. I'm a total noob at all of this.

We can send mails to internal addresses (for example, if our domain name is, the server can send mail to [email][/email]) with no problem.

We can't send mail to external addresses like [email][/email] or [email][/email]. Here's an example of what I get in /var/log/mail.log

Mar 7 14:45:29 newton sm-mta[17159]: r27JjOw1017159: to=<>, ctladdr=<root@newton.forrest> (0/0), delay=00:00:05, xdelay=00:00:05, mailer=relay, pri=30455, [], dsn=5.7.1, [B]stat=User unknown[/B]

Also, I get this:

[CODE]root@newton:/etc/mail# sendmail -bv deliverable: mailer relay, host, user[/CODE]

Does that mean the [email][/email] is unknown to newton, or unknown to Exchange?

Is there something in Exchange we need to configure?

I have no idea what to configure. Please help. Thanks!

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