On Wed, 2003-01-08 at 05:48, Jeremy C. Reed wrote:
> On Wed, 8 Jan 2003, Giuliano Gavazzi wrote:
>
> > I have instead done a test on the sender address you quoted. The
> > mailserver mail.reedmedia.net was so slow (the banner came up after
> > 90 seconds) that their server might have given up while doing a
> > server callout. So the delay you saw was probably a delay at
> > mail.reedmedia.net. This delay might come from an ident call timing
> > out?
>
> I did some debugging and it was delaying on
> checking RBL domain spews.relays.osirusoft.com
Most of the Osirusoft lists are down because the Osirusoft master zone
is (idiotically enough) on a DSL pipe, which went down because of
windstorm induced power outages (the california Santa Ana winds).
As the damned master zone has a TTL of ~ 1 hour (why?) - most of the
spews.org slaves have started returning SERVFAIL for the spews zone.
IMHO, the best way to go if you are querying multiple DNSBLs, is to run
a local instance of rbldns (
http://cr.yp.to/djbdns/rbldns.html) and
cache a local copy of each DNSBL you use (get it with axfrdns, or
download the zone as a text file and run a script to convert it to
rbldns / tinydns format)
We do that - and were largely unaffected (beyond having a slightly stale
copy of the spews zone) by this outage. [Thank God. Given the volume
of mail we move, such delays would have been catastrophic]
srs
