- URIBL http://www.uribl.com/ (rule URIBL_BLOCKED)
- DNSWL http://www.dnswl.org/ (rule RCVD_IN_DNSWL_BLOCKED)
- Spamhaus http://www.spamhaus.org/
- SURBL http://www.surbl.org/ (rule SURBL_BLOCKED)
Q: This documentation doesn't seem to cover how to configure DNS-Blocklists. It says "Support for these is built-in" but I can't believe that all free BL's is called each time a mail is beeing checked. There must be a way to configure which to use.