Hi!
sbl is not really intended to be used with message body URI checkers like SpamCopURI or urirhsbl, but it may get a few hits since I think Spamhaus may include a few spam URI domains in SBL. But the results will probably not be too useful or productive, since it's not an intended use of sbl.spamhaus.org.
Actually, having done some tests using uridnsbl under SA 3 as well as manual checks, I would say that SBL is an excellent tool for catching spam domains in message body URIs.
I don't think everyone is aware of what uridnsbl, as an alternative to urirhsbl/urirhssub, actually does, so I'll try to explain it.
First - SBL does not just list IPs used by known spammers to relay mail. It lists any ips used by known spammers, for whatever purpose. That includes web sites as well as, and most importantly, dns servers.
I picked the 10 most recently reported domains to the SC blocklist and manually checked what dns servers they used, and if the IPs for those dns servers where already listed in SBL. For 9 out of 10, they where. Data included below.
But those are also in SURBL, except one, but that one isnt active anymore. So for me, i would save the resolving and use SURBL for now :) Its however a nice addon to what SURBL does, it goes 2 steps further, but it also more expensive on busy servers to do many more lookups and resolving.... instead of resolving on a fast RBL server you can encounter relatively slow span DNS servers, and it will delay your mailflow...
Bye, Raymond.