On Sun, Apr 28, 2013 at 06:52:09PM -0500, Stan Hoeppner wrote:
> >> defer_unauth_destination etc.. is the default safety net for
> >> sites that haven't set smtpd_relay_restrictions
> >
> > ah, i remembered correct it was set by "postfix upgrade-configuration"
> > at the bottom of "main.cf", maybe the "safety net" should be the
> > same as "postconf -d" which is "reject_unauth_destination"?
>
> What practical difference do you see between these two reject codes?
> The client in this transaction is almost certainly not an MTA. It's
> most likely rat/malware, which typically either:
There is an important difference, which is why the defer variant
is used as a safety net, and the use-case is precisely when the
client is an MTA.
--
Viktor.
