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   version: 0.01 (15 Jan 2001)
    
   disclaimer: this addon is based on code of ucspi-tcp-0.88
   written by D. J. Bernstein. It may or may not work
   with previous/later versions of the ucspi-tcp package.
    
   rblsmtpd blocks mail from RBL-listed sites.
   It works with any SMTP server that can run under tcpserver. 
   this addon allows for tagging messages with X-RBL-Check header fields.
   it adds a    -p rblid:baseoption to
   the standard rblsmtpd options. if an ip has a TXT record in a
   RBL source base, the rblid will be put in the environment
   variable RBLID. if you specify more than one -p option the rblids
   of the RBL sources that list the ip will be separated by spaces. 
   in order to add X-RBL-Check header lines from the RBLID environment
       variable you also need my addon to qmail-smtpd.
   to allow users to filter messages based on X-RBL-Check header lines
       in their .qmail files you may want to have a look at my
       822xrblcheck package.
    
   example:
       rblsmtpd -p SPC:rbltest.space.net [program]will result in RBLID="SPC" if the ip of the connector
   is listed in the RBL rbltest.space.net. this will also result in a log
   entry like     rblsmtpd: 195.30.1.54 pid 5591: RBLID="SPC" 
   download:
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