postgrey
(written in Perl) is a Postfix policy server implementing
greylisting developed by David Schweikert
- Homepage = http://postgrey.schweikert.ch/
- Project + Issues = https://github.com/schweikert/postgrey
It is recommended that you use Postgrey from your Linux distribution, if possible. Otherwise, you will need to install first the following requirements:
- Perl >= 5.6.0
- Net::Server (Perl Module)
- IO::Multiplex (Perl Module)
- BerkeleyDB (Perl Module)
- Berkeley DB >= 4.1 (Library)
- Digest::SHA (Perl Module, only for --privacy option)
- NetAddr::IP
To see the documentation in postgrey. Execute:
perldoc postgrey
(or man postgrey
if you are using a pre-built Postgrey distribution).
You can find at the following URL the latest whitelist that is included in the Postgrey distribution:
https://postgrey.schweikert.ch/pub/postgrey_whitelist_clients
If you fetch this list automatically, please make sure that you don't do it too frequently (updating once a day is ok).
There is a mailing-list for the discussion of postgrey, where you can also ask for help in case of trouble. To subscribe, send a mail with subject 'subscribe' to:
There is also a mailing-list archive, where you might find answers:
http://lists.ee.ethz.ch/wws/arc/postgrey