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	WHAT IS IT:
		modularized contentfilter for Zmailer
	COPYRIGHT:
		(c) 2005 Eugene G. Crosser <crosser@average.org>
	LICENSE:
		The same set as apply to Zmailer code

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This is a module for zmscanner (http://www.average.org/zmscanner/)
that checks SPF data for the submission, adds a varpool object
with result, and optionally an "SPF-Received" header.

THIS MODULE IS ONLY RELEVANT WITH "smscanner" (Milter interface to
Sendmail) BECAUSE Zmailer ALREADY HAS SPF SUPPORT.  AND BECAUSE
Zmailer CONTENTFILTER INTERFACE DOES NOT ALLOW TO ADD HEADERS.

Because this module does DNS lookups on the "envfrom" stage, when you
run it in a milter, you will want to increase "timeout for reading reply
from the filter", like this:

INPUT_MAIL_FILTER(`smscanner', `S=unix:/var/run/smscanner/sock, F=T, T=R:1m')

See http://www.milter.org/milter_api/installation.html for explanations.

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Appendix: building from Subversion

$ svn co svn://svn.average.org/zmscanner/zms_spf/trunk zms_spf
$ cd zms_spf
$ aclocal
$ autoheader
$ libtoolize
$ automake -a
$ autoconf
$ ./configure --various-options 

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 $Id$