822xrblcheck

version: 0.01 (15 Dec 2000)

Warning: the 0.01 version had a bug which caused it not to match X-RBL-Check values correctly (e.g. if they contained "." and other special characters). version 0.02 fixes this problem

disclaimer: this package is based on code taken from mess822-0.58 written by D. J. Bernstein. It may or may not work with previous/later versions of the mess822 package.

822xrblcheck reads an 822-format mail message from its standard input and matches (case insensitive) the contents of X-RBL-Check fields from the message against the rblids given on the command line

if no X-RBL-Check field is found it exists 1.
if no rblid matches the X-RBL-Check field(s) it exists 1.
if a rblid matches the X-RBL-Check field(s) it exists 0
the message "rejected: sending host is listed with <rblid>" is written to stdout, where <rdblid> is the rblid that had the first match.
if an error condition is encountered it exists 111.

822xrblcheck is intended to be used in .qmail files like:

   |bouncesaying "no messages from blacklisted hosts accepted" /path/to/822xrblcheck MAPS-DUL MAPS-RSS

this will cause all messages to be rejected that contain - anywhere in the header of the message - either one or both of the lines

   X-RBL-Check: MAPS-DUL
   X-RBL-Check: MAPS-RSS

note: there is a flaw/undocumented feature in bouncesaying: if program prints something to stdout this text is sent back in case of a bounce instead of the error message supplied to bouncesaying.

the X-Check-RBL headers can be inserted with my qmail-smtpd addon together with my rblsmtpd tagging addon.

822xrblcheck-0.02.tar.gz (2 kb) c source, man page, patch to Makefile
unpack this in the mess822-0.58 directory. it will create the following files:
822xrblcheck.c (1 kb) c source
822xrblcheck.1 (2.3 kb) man page
822xrblcheck.Makefile.patch (1.7 kb) patch to mess822-0.58/Makefile