= R =
Abbreviation: "Realtime Blackhole List". A
service that allows people to blacklist sites for emitting
spam, and makes the blacklist available in real time to
electronic-mail transport programs that know how to use RBL so they
can filter out mail from those sites. Drastic (and controversial)
but effective. There is an
RBL home page: <http://www.spam-rbl.com/>.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.