Editing Anti-spam techniques (section)

===URL filtering===
{{Main|DNSBL#URI DNSBLs}}

Most spam/phishing messages contain an URL that they entice victims into clicking on.  Thus, a popular technique since the early 2000s consists of extracting URLs from messages and looking them up in databases such as [[The Spamhaus Project|Spamhaus]]' Domain Block List (DBL), [[SURBL]], and URIBL.<ref>{{cite web |url=http://wiki.asrg.sp.am/wiki/URL_filtering |title=URL filtering |author1=Jose Marcio Martins Da Cruz |author2-link=John Levine |author2=John Levine |date=May 2009 |website=[[Anti-Spam Research Group]] wiki |access-date=2 December 2015 |url-status=live |archive-url=https://web.archive.org/web/20151208132824/http://wiki.asrg.sp.am/wiki/URL_filtering |archive-date=8 December 2015 }}</ref>