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This program is a very basic interface to Paul Vixie's RBL filter. The
basic idea of the filter is that when someone is blacklisted for an email
abuse, a new domain name is resolved in the form of
"a.b.c.d.rbl.maps.vix.com", where "a.b.c.d" is actually the IP address
"d.c.b.a". For example, if the IP address 127.0.0.2 were listed as a
blacklisted address, "2.0.0.127.rbl.maps.vix.com" would have a DNS entry
(this is a real example; that address is in place as a verification
mechanism).
For more information about the RBL blacklist, please take a look at
http://maps.vix.com/rbl/ . For more information about BIND, drop by
http://www.isc.org/bind.html . The official home page for rblcheck is at
http://www.xnet.com/~emarshal/rblcheck/ .
Any ideas, bugfixes, or porting notes should be sent to me at
"emarshal@logic.net". Don't bug the MAPS people about this; they didn't
write it, and probably woudn't like getting a bunch of mail about it.
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