SpamAssassin Rule: RCVD_IN_RP_RNBL
Standard description: Relay in RNBL, https://senderscore.org/blacklistlookup/
The last external relay in the Received chain was listed in the DNSBL Return Path Reputation Network Blacklist (RNBL).
Reputation Network Blacklist is based on real time data compiled through our cooperative Reputation Network.
The default scores for this rule can be found in the online list of tests.
See: https://senderscore.org/rtbl/ for details on requesting removal from this list.