I have just released SpamCopURI 0.13. This release adds some basic query caching as well as registrar based lookups against the RBL. Instead of querying for both the 2nd and 3rd level domain we are now only querying for the 2nd OR the 3rd based on the TLD. Let me know if you see any issues with this: false positives, misses that should be hits, etc.
We are now caching the query results on a per test basis so multiple URLs to the same to domain should only get checked once per RBL.
There is also a change that fixes a compile error under Perl 5.005 reported on this list.
Open redirect resolution is still off by default. I would like to hear how this has worked out for those that have enabled it. Do you think its safe enough to enabled it by default?
The latest release can be retrieved from http://sourceforge.net/projects/spamcopuri
--eric