Postfix: phantom hostname.

[Bill Mullen]

On Tue, 2005-06-21 at 13:42, Ken D'Ambrosio wrote:
> Okay, this is pissing me off.
> 
> I've got a machine, currently "reddwarf", that used to be "nebula".  
> I've -- obviously -- changed its name.  "nebula" isn't mentioned in 
> /etc/hosts, and the IP resolves (both reverse and forward) to reddwarf.  
> /etc/hostname is reddwarf.  The "live" hostname (eg. the output of 
> "hostname") is reddwarf.  /etc/mailname is reddwarf.  A "strace -f 
> postfix" doesn't show the word "nebula" anywhere.  "nebula" isn't 
> mentioned in any of the postfix config files; reddwarf is.  I've made 
> sure that the postfix processes have restarted.  Hell: I've dpkg 
> --purge'd postfix (after installing exim), and then installed postfix 
> again from scratch.
> 
> THEN WHY THE FLOCK, WHEN I TELNET TO PORT 25, DOES IT THINK IT'S NEBULA?!
> 
> Suggestions as to why this might be would go a long way toward saving 
> the small amount of sanity I have left.

If Postfix runs chrooted, some portions of it will be using the copies
of certain /etc files located under the chroot dir (on my system, the
"/var/spool/postfix/etc" dir holds these files); if these files differ
from the ones in /etc, I get warnings in my mail logs to that effect.

moon at mail:~$ ls /var/spool/postfix/etc/
host.conf  hosts  localtime  nsswitch.conf  resolv.conf  services

That's the only factor that I can think of, but it's a longshot ... :-/

-- 
Bill Mullen
RLU# 270075