Breezy borked postfix (seriously!)

[David]

On Thu, Dec 22, 2005 at 03:11:19PM +1100, Peter Lieverdink wrote:
> David wrote:
> > Hoary/postfix worked great for local mail delivery. After upgrade to 
> > Breezy, postfix seems to have got reconfigured (not removed) so that it 
> > silently queues all email. 
> > 
> > /var/log/mail.err says:
> > Dec 22 13:41:50 localhost postfix/master[15812]: fatal: 
> > /etc/postfix/master.cf: line 84: bad hostname or network address: ::1:smtp
> > 
> > /etc/postfix/master.cf says:
> > 127.0.0.1:smtp inet n   -       -       -       -       smtpd
> > ::1:smtp       inet n   -       -       -       -       smtpd
> > 
> > /etc/postfix/main.cf says:
> > mynetworks = 127.0.0.0/8
> > myhostname = test.kenpro.com.au
> > 
> > david at test:~ $ cat /etc/hostname
> > test
> > david at test:~ $ cat /etc/resolv.conf
> > search kenpro.com.au
> > 
> > I have no idea where the line 
> > ::1:smtp       inet n   -       -       -       -       smtpd
> > in master.cf comes from, but by commenting it out and restarting postfix, 
> > all my queued mail was instantly delivered, so that must be the culprit.
> > 
> > Can anyone suggest what I've done wrong?
> 
> You disabled ipv6 support :-)
> 
> ::1 is 'localhost' in ipv6 format. Do you have an entry like:
> 
> "::1     ip6-localhost ip6-loopback"
> 
> in /etc/hosts?
> 
> By not loading the ipv6 module, postfix can't listen on that address,
> and thus fails. Commenting it out like you say you did is a safe solution.
___________________________________
david at test:~ $ cat /etc/hosts
<snip>
# The following lines are desirable for IPv6 capable hosts
# (added automatically by netbase upgrade)

::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
__________________________________

I'm curious how this would have come about. I'm happy to leave ipv6 
disabled but does this constitute a bug? given that all I did was 
hoary->breezy upgrade.

What causes the ipv6 module to be loaded?

Thanks for your answer.

David.