some minor Core pruning

[Dennis Gilmore]

> On Wed, 2006-06-28 at 07:10 -0500, Josh Boyer wrote:

> There are arguments for it being Exim, which is capable of acting as
> simple outgoing relay and is _also_ capable of much more; spam checking,
> antivirus, greylisting, etc. -- all without third-party software (other
> than SA and ClamAV themselves). I think that's probably the best choice
> -- it's easy to configure, well documented, more functional than any of
> the alternatives, and has a good security record. It also has complete
> and _mature_ support for IPv6, unlike postfix which was recently
> observed to be bouncing mail for domains with IPv6-only primary MX.

postfix 2.2  added a config option  for /etc/postfix/main.cf

inet_protocols

with the default being ipv4  only so i would have a guess that postfix was
not configured correctly

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=197105  filled a bug
requesting change in default config

Dennis