DNSBL / DNSWL

Domain Name System-based Blackhole Lists / White Lists are tools in Spam control.

See:

• Wikipedia: DNSBL
• RFC 5782

rbldns

We use djbdns’ rbldns for DNSxLs.

• Configuration of rbldns
  • blacklist
  • whitelist

Documentation of the data file format: rbldns-data.

DNS Data

RFC 5782 states that:

• The standard response for an entry is 127.0.0.2

• The rbldns data file must contain a test record for the IP address 127.0.0.0.2, There must be NO entry for 127.0.0.1

Also:

• The rbldns data files TXT record should point to a website explaining why an IP is in the database, what the effect of this is and how to remove it (if at all).