March 8th, 2013, 02:16 PM
Trying to configure sendmail in Debian
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 ourdomain.com, the server can send mail to email@example.com) with no problem.
We can't send mail to external addresses like firstname.lastname@example.org or email@example.com. Here's an example of what I get in /var/log/mail.log
Mar 7 14:45:29 newton sm-mta: r27JjOw1017159: to=<firstname.lastname@example.org>, ctladdr=<email@example.com> (0/0), delay=00:00:05, xdelay=00:00:05, mailer=relay, pri=30455, relay=webmail.ourdomain.ws. [xxx.xxx.xxx.xxx], dsn=5.7.1, stat=User unknown
Also, I get this:
Does that mean the firstname.lastname@example.org is unknown to newton, or unknown to Exchange?
root@newton:/etc/mail# sendmail -bv email@example.com
firstname.lastname@example.org... deliverable: mailer relay, host webmail.ourdomain.ws, user email@example.com
Is there something in Exchange we need to configure?
I have no idea what to configure. Please help. Thanks!
March 27th, 2013, 07:14 AM
Have you configured DNS correctly. Is your MX record pointing to correct server?
Paste the output of
cat /etc/sendmail.cf , /etc/mail/relay-domains and /etc/mail/access