About RFC2
RFC2 is not a list of spammers.
RFC Ignorant
With RFC Ignorant closed down, we've expanded to include their lists. You can check to see if a hostname is contained in our lists by attempting to resolve one of the following patterns (generally you need only check whether the host resolves or not rather than worry about the exact IP).
- hostname.dsn.rfc-clueless.org resolves to 127.0.0.2
- hostname.postmaster.rfc-clueless.org resolves to 127.0.0.3
- hostname.abuse.rfc-clueless.org resolves to 127.0.0.4
- hostname.bogusmx.rfc-clueless.org resolves to 127.0.0.8
The following list is deprecated, and will be removed by the end of the year 2020.
- hostname.whois.rfc-clueless.org resolves to 127.0.0.5 (or 127.0.0.7 if the TLD is listed)
Meta-lists
You can query all lists at once by querying hostname.fulldom.rfc-clueless.org, which will resolve to 127.0.0.1 if hostname is listed in any of our lists.
For more information, we direct you to the list of frequently answered questions