Postgrey

• "Postgrey is a Postfix policy server implementing greylisting" -- [web site]
• Responding to this SAC ticket

Dependencies

It uses the BerkeleyDB, and other, perl modules. Perl's -MCPAN install option was failing on building BerkeleyDB module, so RPMs were gathered from searches to pbone.net for RHEL4. Then they were installed like this:

sudo rpm -i perl-BerkeleyDB-0.33-1.el4.rf.i386.rpm perl-IO-Multiplex-1.09-3.el4.pp.noarch.rpm  perl-Net-Server-0.97-2.el4.pp.noarch.rpm postgrey-1.31-1.el4.rf.noarch.rpm

Install & Config

• For more install instructions see the manual (man) pages for postgrey on the server.
• I have completed the install steps up to editing the /etc/postfix/main.cf file:

...
     ·   Put something like this in /etc/postfix/main.cf:
           smtpd_recipient_restrictions =
                         permit_mynetworks
                         ...
                         reject_unauth_destination
                         check_policy_service inet:127.0.0.1:10023
...

TODO

• check firewall settings for postgrey daemon
• start postgrey daemon/service
• restart postfix daemon/service
• watch: /var/log/mail.info

   grep -i Greylisted /var/log/mail.info

References

• http://www.howtoforge.com/greylisting_postfix_postgrey