Saw a link on the Spamhaus site to a sendmail milter:
http://www.five-ten-sg.com/dnsbl.html
"This milter will also decode (base64, mime, html entity) and scan for HTTP and HTTPS URLs and bare hostnames in the body of the mail. If any of those host names have A records on the SBL (or a single configurable list), the mail will be rejected unless previously whitelisted."
Seems to me that should be just as usable with SURBLs as the more limited spam body domain names in sbl.spamhaus.org. Has anyone tried this milter with SURBLs?
Conversely has anyone tried sbl.spamhaus.org as a SURBL in SpamCopURI or urirhsbl?
Either could be interesting....
Jeff C.
Additionally:
Installation and configuration
Usage: Note that this has ONLY been tested on Linux, specifically RedHat Linux. In particular, this milter makes no attempt to understand IPv6. Your mileage will vary. You will need at a minimum a C++ compiler with a minimally thread safe STL implementation. The distribution includes a test.cpp program. If it fails this milter won't work. If it passes, this milter might work. Fetch dnsbl.tar.gz and
tar xfvz dnsbl.tar.gz bash install.bash