Manual:$wgDnsBlacklistUrls/en

Details
Sets a list of DNS blocklists to use, if  is set to. This replaced.

Changes in 1.19
Array values can either be a string containing the URL of the DNS blocklist, or an array containing the URL of the blocklist and an associated "key" should the blocklist require one.


 * Example


 * or

You can find DNSBL-format spam databases on DNSBL.info or other similar websites.