rblcheck 1.0 - Command-line interface to Paul Vixie's RBL filter.
Copyright (C) 1997, Edward S. Marshall <emarshal@logic.net>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

--

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 information on compiling this program, see the file INSTALL.

This program has only been tested under Linux 2.x and Solaris 2.5.1, but
there's no reason it shouldn't work on another platform, as long as a
working resolver library exists (the one from BIND will do perfectly).

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.
