Wietse Venema:
> Guy:
> > Hi guys,
> >
> > I had a problem earlier today when our local DNS server's forwarding
> > servers were slow to respond.
> >
> > I had a number of emails from various sources rejected as blocked by
> > zen.spamhaus.org. The IPs I checked weren't on the list according to
> > the spamhaus website.
> > I did notice that doing a "dig @localdns.server zen.spamhaus.org"
> > didn't always return an answer. After changing the forwarding servers
> > in bind the problem seems to have cleared up.
> >
> > Is this the expected behaviour from Postfix if an rbl cannot be
> > reached? Is it possible to have Postfix pass the mail rather than
> > reject if the server cannot find the rbl? Or would that be a bad idea
> > even if it can be done?
>
> Postfix WILL BLOCK MAIL ONLY when a blacklist server responds.
If you believe this is not true, then you MUST provide the evidence
in the form of mail logging that Postfix falsely rejected mail
after a failed zen.spamhaus.org lookup.
But of course it is much easier to post rumors on this mailing list
that Postfix is buggy, then doing the due diligence.
Wietse
