Sender Policy Framework

Implementations

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SPF Libraries

Reference Implementation: Mail::SPF::Query

The Perl module Mail::SPF::Query has been the very first implementation of SPF and is currently the de facto reference implementation. It roughly conforms to the latest specification, however due to its long heritage (reaching back to 2003) there are some deviations. The Mail::SPF::Query package includes a comprehensive test suite, a command-line query tool, a query server, and sample plugins for several mail servers. The library also supports a number of non-standard features, such as best-guess processing and trusted forwarder accreditation checking.

The project is currently working on a new Perl module, Mail::SPF, to replace Mail::SPF::Query as the reference implementation (ETA April 2006).

Production-Grade Libraries

Name	Type	Author(s)	Contact
libspf	C	James Couzens, Sean Comeau	James Couzens
libspf2	C	Shevek, Wayne Schlitt	(see website)
RMSPF	C (Windows)	Roger Moser	Roger Moser
Mail::SPF::Query	Perl	Meng Weng Wong et al.	`spf-discuss`
pyspf] 1.6]	Python	Terence Way	[[Mailto::terry-spf@wayforward.net	Terence Way
[1]	Python	Stuart Gathman	(updates part of pyMilter)]]
SPFJava	Java	Neil Murray, Roger Fullerton	Neil Murray

SPF Extensions for Mail Clients

Name	Type	Author(s)	Contact
[2]	Thunderbird	Joshua Tauberer	(see website)

SPF Extensions and Patches for Mail Servers

To be done; for now see the old website.

Unless noted otherwise, all content on this website is dual-licensed under the GNU GPL v2 and the Creative Commons CC BY-SA 2.5.
The openspf.org domain name was donated by James Couzens, and related domain names by John Pinkerton. Thanks!