Postfix and hostname
I've a domain foobar.com and I'm "out-sourcing" the email of this account to Google Apps for your Domain. Meaning that the MX records of foobar.com point to Google.
I've a linode with Ubuntu 8.04 and after install the hostname was "ubuntu" and the beginning of /etc/hosts file was:
127.0.0.1 localhost
127.0.1.1 ubuntu ubuntu.linlan
Then I installed Postfix and in the Postfix configuration I set node-n.foobar.com as my destination (because I want my linde to be called node-n). I didn't changed hostname.
Then I tested the instalation with the command sendmail. It sent OK and I checked the header of the sent message:
Received: from ubuntu.linlan (xxxxxx.members.linode.com [xxx.xxx.xxx.xxx])
by mx.google.com with ESMTP id 6si13606729ywp.3.2008.05.05.10.07.59;
Mon, 05 May 2008 10:08:11 -0700 (PDT)
I disliked the "Received: from ubuntu.linlan" because I want it to be node-n or node-n.foobar.com.
So I edited /etc/hostname changing it to node-n and /etc/host changing it to:
127.0.0.1 localhost
127.0.1.1 node-n node-n
The problem is… the header keeps ubuntu.linlan as hostname/localdomain. Can I get ride of that?
Thanks for your help.
7 Replies
Mike
You can see what postfix thinks it is with "postconf myhostname" and "postconf myorigin". (I don't have the standard Ubuntu postfix setup on even my Ubuntu machines so I can't remember which of those two points to the other.)
First I change my /etc/hosts to
127.0.0.1 localhost
127.0.0.1 node-n node-n.foobar.com
Then I issued:
sudo /etc/init.d/postfix reload
sudo /etc/init.d/postfix restart
But no success! The Received: from ubuntu.linlan keeps appearing! I even tried to reboot my server… no luck.
Perhaps this is a setting from Linode and has nothing to do with my machine.
@mendel:
Ubuntu puts the hostname used by Postfix in /etc/mailname, IIRC.
You can see what postfix thinks it is with "postconf myhostname" and "postconf myorigin". (I don't have the standard Ubuntu postfix setup on even my Ubuntu machines so I can't remember which of those two points to the other.)
Yes Mendel… it worked!! Thanks!
I issued "postconf" myhostname and it returned "ubuntu.linlan"… so something was wrong.
Then I edited /etc/postfix/main.cf, the variable myhostname was there. I replaced "ubuntu.linlan" by "node-n.foobar.com", and I restarted postfix.
Now it works like a charm!
@mendel:
/etc/mailname :)
/etc/mailname was right. The problem was in /etc/postfix/main.cf because I installed Postfix prior to the hostname/hosts change and the variable is not redefined.
I love UNIX but sometimes… ggg!
@ngm:
I love UNIX but sometimes… ggg!
;)
Well, this time you can blame Debian specifically. Postfix as distributed defaults to the machine's hostname for myhostname and myorigin.