Pretty sure you were reading the list back in 2009. Maybe you forgot EmailBL? Just md5 the address - but there's no standard so it's up to you.
http://www.gossamer-threads.com/lists/engine?list=spamassassin&do=search_results&search_forum=forum_2&search_string=emailbl On Wed, Jul 29, 2015 at 09:02:18AM -0700, Marc Perkel wrote: > Just wondering. > > I'm thinking about creating an RBL to block email addresses. But you > can't use an @ in a hostname for lookups. So - is there a standard > RBL format for email addresses or do I need to just make something > up? > > -- > Marc Perkel - Sales/Support > supp...@junkemailfilter.com > http://www.junkemailfilter.com > Junk Email Filter dot com > 415-992-3400