python-spf(1)						      General Commands Manual						     python-spf(1)

NAME

       pyspf - pure-Python SPF library

VERSION

       2.0.7

DESCRIPTION

       SPF does email sender validation.  For more information about SPF, please see http://www.openspf.org/

       One incompatible change was introduced in version 1.7.  Prior to version 1.7, connections from a local IP address (127...) would always
       return a Pass result.  The special case was eliminated.	Programs calling pySPF should not do SPF checks on locally submitted mail.

       This SPF client is intended to be installed on the border MTA, checking if incoming SMTP clients are permitted to forward mail.	The SPF
       check should be done during the MAIL FROM:<...> command.

USAGE

       There are multiple ways to use this package:

	   To check an incoming mail request:
	       % pyspf [-v] {ip} {sender} {helo}
	       % pyspf 69.55.226.139 tway@optsw.com mx1.wayforward.net

	   To test an SPF record:
	       % pyspf [-v] "v=spf1..." {ip} {sender} {helo}
	       % pyspf "v=spf1 +mx +ip4:10.0.0.1 -all" 10.0.0.1 tway@foo.com a

	   To fetch an SPF record:
	       % pyspf {domain}
	       % pyspf wayforward.net

	   To test this script (and to output this usage message):
	       % pyspf

       For instance, during an SMTP exchange from client 69.55.226.139::
	       S: 220 mail.example.com ESMTP Postfix
	       C: EHLO mx1.wayforward.net
	       S: 250-mail.example.com
	       S: ...
	       S: 250 8BITMIME
	       C: MAIL FROM:<terry@wayforward.net>

       Then the following command line would check if this is a valid sender:
	       % pyspf 69.55.226.139 terry@wayforward.net mx1.wayforward.net
	       ('pass', 250, 'sender SPF authorized')

       Command line calls return RFC 4408 result codes, i.e. 'pass', 'fail', 'neutral', 'softfail, 'permerror', or 'temperror'.

RFC 4408 TEST SUITE
       The package also installs the python-spf test driver and the current (as of the release date) YAML (Yet Another Markup Language) RFC 4408
       test definitions.  As errors or improvements in the test definitions are approved, they are available from:

       <http://www.openspf.net/Test_Suite>

       To run the test suite, change the directory the test suite is installed in:

       $ cd /usr/share/doc/python-spf

       Uncompress testspf.py.gz, testspf.py.gz, and rfc4408-tests.yml.gz

       and then run testspf.py:

       $ python testspf.py

       The test suite supports multiple allowed results with a warning for a non-preferred result.  For the current version, the expected results
       are:

	 WARN: invalid-domain-long in rfc4408-tests.yml, ['8.1/2', '5/10']: fail
	       preferred to temperror
	 WARN: txttimeout in rfc4408-tests.yml, 4.4/1: fail preferred to temperror
	 WARN: spfoverride in rfc4408-tests.yml, 4.5/5: pass preferred to fail
	 WARN: multitxt1 in rfc4408-tests.yml, 4.5/5: pass preferred to permerror
	 WARN: multispf2 in rfc4408-tests.yml, 4.5/6: permerror preferred to pass

OTHER PROGRAMS

       This package also provides two additional helper scripts; type99.py and spfquery.py.  The type99.py script will convert DNS TXT strings to
       a binary equivalent suitable for use in a BIND zone file.  The spfquery.py script is a Python reimplementination of Wayne Schlitt's spf-
       query command line tool.  These scripts are described in pyspf-type99(1) and spfquery.pyspf(1) man pages.

SEE ALSO

       RFC 4408, <http://www.openspf.org>

AUTHORS

       This version of pyspf was written by Terence Way <terry-spf@wayforward.net> and updated by Stuart Gathman <stuart@bmsi.com> and Scott Kit-
       terman <scott@kitterman.com>.

       This man-page was created by Scott Kitterman <scott@kitterman.com>.

								    2012-02-05							     python-spf(1)