Daniel Gehriger
gehriger@linkcad.com
Wed, 28 Feb 2007 00:06:02 +0100
Vernon Schryver wrote: >> From: Daniel Gehriger > >> I just upgraded to the latest DCC and found this entry in the log. I >> can't figure out why the message has been rejected, even though >> zen.spamhaus.org doesn't list any of the IPs contained in the e-mail. > > I was wrong about Spamhaus' PBL. Because zen.spamhaus.org includes > pbl.spamhaus.org, and pbl.spamhaus.org includes IP addresses that are > known to not send spam but are MX or DNS servers (e.g. Comcast's NS > RRs), it is probably not a good idea to use -Bzen.spamhaus.org, > at least not without -Bset:no-MX and -Bset:no-NS. Ok, I'll have a look at this. > > The complaints about DNS timeouts are not good. Is something wrong > with your DNS system? Dccifd should have at least received NXDOMAIN > for 86.59.190.206.zen.spamhaus.org from your local caching DNS server. > (I trust you have sufficient reasons for marking a Yahoo IP address > in /var/dcc/whiteclnt as one of your MX servers.) [ Yep, Yahoo should be in there. ] There shouldn't be any issues with the DNS system. Most of the time, dccifd doesn't complain about timeouts but then I get waves of those messages until a new DCC DNS helper is started. > > However, none of that is not relevant to this case, because dccifd says > that it got no answers from your DNS resolver. Besides, "DCC-->spam" > claims that the message was rejected because its checksum counts were > above the local definition of "bulk". If a DNSBL result were involved, > there would have been a "DNSBL-->spam" string. The strangeness is that > all of the checksums for the message except IP address of the SMTP > client, 206.190.59.86, were unique to this message. The only way that > makes sense is if DCCIFD_REJECT_AT=0 in /var/dcc/dcc_conf to cause > dccifd to have a -t bulkd threshold of 0. With what -t value is dccifd > running? > Here is the output of ps: /var/dcc/libexec/dccifd -Ivscan -tREP,10 -tCMN,50,50 -Bset:debug=5 -Brelays.ordb.org,any -Bzen.spamhaus.org,any -llog -wwhiteclnt -Uuserdirs -GIPmask/24 -p 127.0.0.1,10023 127.0.0.1/32 -o 127.0.0.1,10026 -SHELO -Smail_host -SSender -SList-ID Regards, Daniel