SURBL (SPAM URI REALTIME BLOCKLIST)
It looks like a new interesting RBL:
SURBLs differ from most other RBLs in that they're used to block messages based on the domain names in message body URIs (usually web sites), for example those which have been previously reported to SpamCop as "Spamvertised sites". So SURBLs are not used to block spam senders like most other RBLs; instead they allow you to block messages based on spam domains that occur in their message bodies.
SURBL Homepage
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