Sahil Tandon:
> Just following up to close this discussion.
>
> On Sun, 2012-05-06 at 09:35:24 -0400, Wietse Venema wrote:
>
> > Sahil Tandon:
> > > May 5 10:00:26 mx1 postfix/postscreen[38500]: warning:
> > > psc_dnsbl_request: connect to private/dnsblog service: Connection refused
> > > May 5 10:00:26 mx1 last message repeated 8 times
> > dnsblog results.
> > ...
> > Whatever this problem may be, it should be easy enough to re-create
> > with "smtp-source -A" by setting up a dummy postfix instance with:
> >
> > - pregreet turned off
> > - the smallest-possible greet-wait
> > - sending dnsbl queries to a wild-card local DNS server
> >
> > This will reduce sharing of DNSBL results between multiple SMTP
> > sesssions (and thus increase the DNSBL lookup rate).
> > ...
>
> I could not reproduce the warning with smtp-source, but FWIW it recurs
> daily -- with varying frequency -- on the production MX. I enabled
> verbose logging for dnsblog(8) and postscreen(8) for a few hours, and
> could not[*] glean anything useful from the logging that precedes the
> warning.
Which OS? The same one that causes DNSBL lookups to go astray so
that a client isn't blocked as expected? I can put it in a VM and
hammer it until eternity. Please send your master.cf off-list.
Wietse
Wietse
