From Free Software Directory
Jump to: navigation, search


purely Perl-based mail filter framework for the Courier MTA

Courier::Filter implements the Courier MTA's courierfilter interface as a framework for mail filter modules. Authors of filter modules can concentrate on writing the actual filter logic without having to care about the usual low-level details of the courierfilter interface. Logging to various facilities is also supported.

Courier::Filter allows multiple filter modules to be installed in stacked and hierarchically grouped configurations. Also, modules' polarity can be reversed, so some modules can be used for explicitly accepting messages while others are used in the traditional way for rejecting messages.

The following filter modules are included: * BlankBody: matching of blank bodies (a stupid spammer symptom) * DNSBL: matching of calling MTA's IP address against DNS black-lists * SPF: authentication of sender addresses in inbound messages

  • SPFout: authentication of sender addresses in outbound

messages * Envelope: matching of RFC 2821 message envelope fields * Header: matching of RFC 2822 message header fields

  • FakeDate: detection of implausible and malformed date header

fields * ClamAVd: malware detection using the ClamAV scanner

  • SpamAssassin: spam detection using SpamAssassin * Parts:

matching of MIME parts and ZIP archive contents * SendCopy: sending message copies to additional recipients



Verified by

Verified on




Verified by

Debian: gregor herrmann <>

Verified on

31 May 2013


License: artistic or gpl-2+

Leaders and contributors

Julian Mehnle contact

Resources and communication

AudienceResource typeURI
Debian (Ref) (R)
Perl (Ref)

Software prerequisites


"contact" is not in the list (Maintainer, Contributor, Developer, Sponsor, Unknown) of allowed values for the "Role" property.

"Debian (Ref) (R)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.

"Perl (Ref)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.

Date 2015-07-17
Source Debian
Source link


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.