On 3/30/2008 8:44 PM, DJA wrote:
I couldn't get email since Tuesday night due to the ORDB RBL being
turned back on. Hopefully it's fixed now. Same problem with my wife's
company. I'm sure lots of people are still having fun.
For anyone not following what's going on there...
From http://www.heise.de/english/newsticker/news/105612:
ORDB anti-spam blacklist lists everything
For more than a year the ORDB blacklist, which had previously been in
heavy use, has been empty. Every DNS query to the relays.ordb.org zone
would result in the error message, "non-existent".
To report a hit, DNS queryable blacklists (DNSBLs) usually respond with
an IP address in the 127.x.x.x range and since Tuesday, the name server
responsible for the name range under relays.ordb.org does just that for
every query, such as 4.3.2.1.any.relays.ordb.org. Andreas Plesner
Jacobsen, a former ORDB operator, explained to heise online sister
publication iX that this measure has been introduced because the zone is
still swamped with queries. The intention is to get mail server
operators to stop using ORDB. Simply deleting the domain was not a
viable alternative, since the load would then merely be directed to the
.org name server.
Admins should check their mail server and spam filter configurations to
make sure that ORDB is not in use. This should be relatively easy to
determine in most cases, since positive responses from DNSBLs often
result in emails being filtered and in this case would completely stop
email traffic. A somewhat more complicated scenario is when DNSBL
responses are taken into account as just one of a number of spam
criteria. In that case, yesterday's new measure would only gradually
become known to postmasters still using ORDB. (jk/c't)
Karl
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