Your Linux Data Center Experts
This is tumgreyspf, an external policy checker for the postfix mail
server. It can optionally greylist and/or use spfquery to check SPF
records to determine if email should be accepted by your server.
SPF is information published by the domain owner about what systems
may legitimately send e-mail for the domain. Greylisting takes advantage
of spam and viruses that do not follow the RFCs and retry deliveries on
temporary failure. We use these checks as part of our mail system and
have seen several orders of magnitude reduction in spam, lower system
load, and few problems with legitimate mail getting blocked.
It uses the file-system as it's database, no additional database is
required to use it.
Does not require a database library, nor does it suffer from
database corruption as some other greylist implementations have.
Requires few external dependencies.
Little regular maintenance is required.
Code/Bugfixes: On Github
WHATSNEW (first 15 lines):
Version 1.36 -- Thu Nov 24, 2011
New configuration setting "spfAcceptOnPermError" will accept e-mail from
hosts that have invalid SPF records. This is probably the right
thing to do, so defaulting to enabled. Contributed by Jesse Norell.
Added a "COMMON PROBLEMS" section to README, with suggested text from
Changed README to put tumgreyspf in recipient restrictions, not sender.
Reported by George Sexton.
Bug fixed in tumgreyspf-clean when using greylistIpOnly, it wasn't removing
greylist entries. Reported by Michael Meelis and others.
Version 1.35 -- Wed Jul 23, 2009
Fixed a bug caused when the SPF record has a NUL in it.
Reported by Thomas Goirand
: You can get source (and
binaries for selected systems) from www.python.org
SPF requires either the C or Perl binary or
Python SPF library
: tumgreyspf can either call the external SPF checking
program from the SPF site, or the Python SPF library
. The latter
Description and License
tumgreyspf is licensed under the GPL.
tumgreyspf (source, binaries, report formats, documentation and all
related matter) is copyright © 2004-2011 Sean Reifschneider,