Using SORBS with Netscape Messaging Server 4.x
Plugin required - This is available at: http://appsrv.ttnet.net.tr/netscape/.

Matthew Sullivan <matthew@netscape.com> patched antirelay.c against percent (%) hack relay, and this combined with the RBL modification, this new version maybe downloaded here: antirelay.c.

With the new plugin you can configure it as follows:

Edit the antirelay.conf file as follows:
# antirelay.conf
#
# we do not want auth capabilities to be stripped,
# so that SMTP authentication feature shall work.
# this feature is important if you want all users to
# authenticate regardless of their location.
stripauthcapability:0

# we want IP address to be resolved into hostname in
# order to use wildcards with hostnames in configuration file
resolvehostnames:0

# we will trust any authenticated user.
useauthinfo:1

# we will return the error code so that user should authenticate
# in order to send mail.
advertiseauthinfo:1

#rbl query hosts
rbldomain:dnsbl.sorbs.net
rbldomain:relays.osirusoft.com

# domains we accept delivery. enter your own domain here.
delivery:*@sorbs.net
delivery:*@netscape.com

# domain we accept relaying. enter your own domain here.
submission:212.156.*.*
submission:195.175.230.*
submission:194.54.34.7
submission:127.0.0.1
# 
# The following lines are dangerous and should not be used...
submission:*.netscape.com
submission:*.sorbs.net
submission:localhost
# They are dangerous because DNS reverse lookups maybe faked
# thereby defeating the antirelay block.
We should activate this plugin. First type:
cd usr/netscape/server4/msg-yourhostname
Then type
cd /usr/netscape/server4/msg-*/
./configutil -l -o service.smtp.protplugmodules \
  -v '/usr/netscape/server4/plugins/antirelay.so'
Restart the SMTP server with:
./stop-msg smtp
./start-msg smtp

 
   
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