Sender Policy Framework

For certain SPF related software, openspf.org is the authoritative source. Here are official source packages for these programs. (Source code repositories for all of them are also hosted by openspf.org.)

python-postfix-policyd-spf

This is Open Patent software. Compared to the Perl policy server, this is a more fully featured solution that is much more configurable and includes various white listing options that would likely be needed for a larger scale site. It's development is ongoing. Suggestions and patches accepted on spf-devel.

0.7.1 (released 2008-07-25 23:44)

No code changes, just documentation updates. See CHANGES for details.

Note: Recommendations for Debian style packaging can be found in the SVN repository for the Debian Python Applications Team.

0.7 (released 2008-06-22 13:45)

Functional additions for this release are a configuration option for receiver policy options to reject messages with SPF Softfail or Neutral results. This can be done globally or for specific domains. There are some number of bug fixes and documentation improvements. See CHANGES for details.

Note: Recommendations for Debian style packaging can be found in the SVN repository for the Debian Python Applications Team.

postfix-policyd-spf-perl

This is Open Patent software. This is a basic solution suitable primarily for small scale sites. It is in maintenance only mode. If enhancements are desired, patches accepted on spf-devel. The 2.000 series uses Julian Mehnle's Mail::SPF library. It is RFC 4408 compliant. It caches results and will only prepend a single SPF Received header for multi-recipient mail. It has a basic (you have to edit the source) ability to whitelist relays and forwarders.

2.007 (released 2008-07-25 22:41)

Documentation updates - See CHANGES for details.

2.006 (released 2008-07-18 00:46)

Added additional logging by default to assist troubleshooting. See CHANGES for details.

sendmail-spf-milter

1.42.1 (released 2006-07-08)

Note that the original source for sendmail-spf-milter is http://srs-socketmap.info/spf/. The revision here differs from that only in the documentation.