pypolicyd-spf-0.5.1/0000755000175000017500000000000010705504711014541 5ustar kittermakittermapypolicyd-spf-0.5.1/python-policyd-spf.spec.opensuse0000644000175000017500000000750210703035102023020 0ustar kittermakitterma#%define mod_name pypolicyd-spf %define name python-policyd-spf %define version 0.5.1 %define release 1 %define prefix %{_prefix} Summary: pure-Python Postfix policy daemon for SPF checking Name: %{name} Version: %{version} Release: %{release} License: GPL Group: Applications/System URL: http://www.openspf.org/Software Source: pypolicyd-spf-%{version}.tar.gz Packager: Boyd Lynn Gerber , Scott Kitterman BuildRoot: /var/tmp/%{name}-root Requires: python Requires: postfix >= 2.1 BuildArch: noarch %description python-policyd-spf is a Postfix SMTPd policy engine for SPF checking. It is implemented in pure Python and uses the python-spf module. The SPF web site is http://www.openspf.org/. The Postfix configuration must be changed to check SPF. See man 1 python-policyd-spf for details.RPM %prep %setup -n pypolicyd-spf-%{version} #%setup %build %install [ -n "$RPM_BUILD_ROOT" -a "$RPM_BUILD_ROOT" != / ] && rm -rf "$RPM_BUILD_ROOT" # make directories mkdir -p "$RPM_BUILD_ROOT"/usr/lib/policyd-spf/ mkdir -p "$RPM_BUILD_ROOT"/var/lib/policyd-spf/config mkdir -p "$RPM_BUILD_ROOT"/var/lib/policyd-spf/data mkdir -p "$RPM_BUILD_ROOT"/usr/sbin mkdir -p "$RPM_BUILD_ROOT"/etc/cron.d # copy over files #for file in policyd-spf policyd-spf-clean configtest \ #for file in policyd-spf configtest \ for file in policyd-spf setup.py policydspfsupp.py do cp "$file" "$RPM_BUILD_ROOT"/usr/lib/policyd-spf/ done cp policyd-spf.conf "$RPM_BUILD_ROOT"/var/lib/policyd-spf/config/ #cp __default__.dist "$RPM_BUILD_ROOT"/var/lib/policyd-spf/config/__default__ # link external programs to /usr/sbin #ln -s /usr/lib/policyd-spf/policyd-spf-configtest "$RPM_BUILD_ROOT"/usr/sbin #ln -s /usr/lib/policyd-spf/configtest "$RPM_BUILD_ROOT"/usr/sbin # set up crontab echo '0 0 * * * nobody /usr/lib/policyd-spf/policy-spf-clean' \ >"$RPM_BUILD_ROOT"/etc/cron.d/policyd-spf # replace pieces in code that need to reflect new directories ( cd "$RPM_BUILD_ROOT"/usr/lib/policyd-spf/ sed 's|^sys.path.append.*|sys.path.append("/usr/lib/policyd-spf")|' \ policyd-spf >policyd-spf.new && \ cat policyd-spf.new >policyd-spf && \ rm -f policyd-spf.new # sed 's|^sys.path.append.*|sys.path.append("/usr/lib/policyd-spf")|' \ # policyd-spf-clean >policyd-spf-clean.new && \ # cat policyd-spf-clean.new >policyd-spf-clean && \ # rm -f policyd-spf-clean.new # sed 's|^sys.path.append.*|sys.path.append("/usr/lib/policyd-spf")|' \ # policyd-spf-stat >policyd-spf-stat.new && \ # cat policyd-spf-stat.new >policyd-spf-stat && \ # rm -f policyd-spf-stat.new sed 's|^defaultConfigFilename.*|defaultConfigFilename = \ "/var/lib/policyd-spf/config/policyd-spf.conf"|' \ policydspfsupp.py >policydspfsupp.py.new && \ cat policydspfsupp.py.new >policydspfsupp.py && \ rm -f policydspfsupp.py.new cd "$RPM_BUILD_ROOT"/var/lib/policyd-spf/config/ sed 's|^spfqueryPath.*|spfqueryPath = "/usr/bin/spfquery"|' \ policyd-spf.conf | \ sed 's|^configPath.*|configPath = "file:///var/lib/policyd-spf/config"|' \ >policyd-spf.conf.new && \ cat policyd-spf.conf.new >policyd-spf.conf && \ rm -f policyd-spf.conf.new ) %clean [ -n "$RPM_BUILD_ROOT" -a "$RPM_BUILD_ROOT" != / ] && rm -rf "$RPM_BUILD_ROOT" %files %defattr(755,root,root) /usr/lib/policyd-spf #/usr/sbin/* /etc/cron.d/policyd-spf %dir /var/lib/policyd-spf %dir /var/lib/policyd-spf/config %config /var/lib/policyd-spf/config/policyd-spf.conf #%config /var/lib/policyd-spf/config/__default__ %attr(700,nobody,root) /var/lib/policyd-spf/data #%doc README CHANGES TODO README-RPM %doc README CHANGES TODO pypolicyd-spf-0.5.1/LICENSE0000644000175000017500000004310310562407507015555 0ustar kittermakitterma GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Lesser General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. 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Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. pypolicyd-spf-0.5.1/policyd-spf.spec0000644000175000017500000000665310703035110017646 0ustar kittermakitterma%define name python-policyd-spf %define version 0.5.1 %define release 1 %define prefix %{_prefix} Summary: pure-Python Postfix policy daemon for SPF checking Name: %{name} Version: %{version} Release: %{release} License: GPL Group: Applications/System URL: http://www.openspf.org/Software Source: %{name}-%{version}.tar.gz Packager: Scott Kitterman BuildRoot: /var/tmp/%{name}-root Requires: python Requires: postfix >= 2.1 BuildArch: noarch %description python-policyd-spf is a Postfix SMTPd policy engine for SPF checking. It is implemented in pure Python and uses the python-spf module. The SPF web site is http://www.openspf.org/. The Postfix configuration must be changed to check SPF. See README.Debian or man 1 python-policyd-spf for details.RPM %prep %setup %build %install [ -n "$RPM_BUILD_ROOT" -a "$RPM_BUILD_ROOT" != / ] && rm -rf "$RPM_BUILD_ROOT" # make directories mkdir -p "$RPM_BUILD_ROOT"/usr/lib/policyd-spf/ mkdir -p "$RPM_BUILD_ROOT"/var/lib/policyd-spf/config mkdir -p "$RPM_BUILD_ROOT"/var/lib/policyd-spf/data mkdir -p "$RPM_BUILD_ROOT"/usr/sbin mkdir -p "$RPM_BUILD_ROOT"/etc/cron.d # copy over files for file in policy-spf policy-spf-clean configtest \ setup.py policy-spfsupp.py do cp "$file" "$RPM_BUILD_ROOT"/usr/lib/policy-spf/ done cp policy-spf.conf "$RPM_BUILD_ROOT"/var/lib/policy-spf/config/ cp __default__.dist "$RPM_BUILD_ROOT"/var/lib/policy-spf/config/__default__ # link external programs to /usr/sbin ln -s /usr/lib/python-policy-spf/policy-spf-configtest "$RPM_BUILD_ROOT"/usr/sbin # set up crontab echo '0 0 * * * nobody /usr/lib/python-policy-spf/policy-spf-clean' \ >"$RPM_BUILD_ROOT"/etc/cron.d/policy-spf # replace pieces in code that need to reflect new directories ( cd "$RPM_BUILD_ROOT"/usr/lib/python-policy-spf/ sed 's|^sys.path.append.*|sys.path.append("/usr/lib/policy-spf")|' \ policy-spf >policy-spf.new && \ cat policy-spf.new >policy-spf && \ rm -f policy-spf.new sed 's|^sys.path.append.*|sys.path.append("/usr/lib/policy-spf")|' \ policy-spf-clean >policy-spf-clean.new && \ cat policy-spf-clean.new >policy-spf-clean && \ rm -f policy-spf-clean.new sed 's|^sys.path.append.*|sys.path.append("/usr/lib/policy-spf")|' \ policy-spf-stat >policy-spf-stat.new && \ cat policy-spf-stat.new >policy-spf-stat && \ rm -f policy-spf-stat.new sed 's|^defaultConfigFilename.*|defaultConfigFilename = \ "/var/lib/python-policy-spf/config/policy-spf.conf"|' \ policy-spfsupp.py >policy-spfsupp.py.new && \ cat policy-spfsupp.py.new >policy-spfsupp.py && \ rm -f policy-spfsupp.py.new cd "$RPM_BUILD_ROOT"/var/lib/policy-spf/config/ sed 's|^spfqueryPath.*|spfqueryPath = "/usr/bin/spfquery"|' \ policy-spf.conf | \ sed 's|^configPath.*|configPath = "file:///var/lib/policy-spf/config"|' \ >policy-spf.conf.new && \ cat policy-spf.conf.new >policy-spf.conf && \ rm -f policy-spf.conf.new ) %clean [ -n "$RPM_BUILD_ROOT" -a "$RPM_BUILD_ROOT" != / ] && rm -rf "$RPM_BUILD_ROOT" %files %defattr(755,root,root) /usr/lib/policy-spf /usr/sbin/* %dir /var/lib/policy-spf %dir /var/lib/policy-spf/config %config /var/lib/policy-spf/config/policy-spf.conf %config /var/lib/policy-spf/config/__default__ %attr(700,nobody,root) /var/lib/policy-spf/data %doc README CHANGES TODO README-RPM pypolicyd-spf-0.5.1/TODO0000644000175000017500000000053510700750616015236 0ustar kittermakittermaObject cache Make the code support operations as a true Dameon Use pyspf to make SPF Received headers Python DBM, Berkeley DB, and Python sqlite whitelist management support Best Guess Local mfrom SPF bypass (per user) Per user (rcpt to address) policy Per user (rcpt to address) whitelisting Prospective SPF checks Domain or address/IP pair reject pypolicyd-spf-0.5.1/setup.py0000755000175000017500000000233210664702266016267 0ustar kittermakitterma#!/usr/bin/env python from distutils.core import setup import os DESC = """python-policyd-spf SPF Postfix policy daemon implemented in Python.""" setup(name='python-policyd-spf', version='0.5', description=DESC, author='Scott Kitterman', author_email='scott@kitterman.com', url='http://www.openspf.org/Software', license='GNU General Public License', py_modules=['policydspfsupp'], keywords = ['Postfix','spf','email'], scripts = ['policyd-spf'], data_files=[(os.path.join('share', 'man', 'man1'), ['policyd-spf.1']), (os.path.join('share', 'man', 'man5'), ['policyd-spf.conf.5']), (os.path.join('share', 'local', 'policyd-spf'), ['policyd-spf.conf'])], classifiers = [ 'Development Status :: 5 - Production/Stable', 'Environment :: No Input/Output (Daemon)', 'Intended Audience :: Developers', 'License :: OSI Approved :: GNU General Public License (GPL)', 'Natural Language :: English', 'Operating System :: POSIX', 'Programming Language :: Python', 'Topic :: Communications :: Email :: Mail Transport Agents', 'Topic :: Communications :: Email :: Filters', 'Topic :: Software Development :: Libraries :: Python Modules' ] ) pypolicyd-spf-0.5.1/CHANGES0000644000175000017500000000717310705467222015551 0ustar kittermakitterma# Legend: # --- = A new release # + = Added a feature (in a backwards compatible way) # ! = Changed something significant, or removed a feature # * = Fixed a bug, or made a minor improvement --- 0.5.1 (2007-10-17 14:47 -0400) * Corrected regression so reject on Permerror works (introduced in 0.4) Thanks to "John A. Martin" for the bug report. * Fixed Restriction Class option to be useful. + Made restriction class names configurable + Added per user whitelisting README to explain how it's useful Thanks to "John A. Martin" for the contribution. * Corrected SPF-Recieved header to us <> for null sender * Corrected Postfix integration section of policyd-spf(1) to reflect correct policy service time limit name. * Corrected installed config file locations in both man pages. * Header and logging cleanup (removed trailing ';' and adjusted whitespace). --- 0.5 (2007-10-03 13:39 -0400) + Added man page for configuration file formatting (man 5 policyd-spf.conf) * Moved explicit logging of the result headers for HELO and Mail From from debug level 1 to debug level 2 (SPF results are already logged at debug level 1) * Moved config file item logging to a new debug level 5. This should only be needed for development and not for operational use. ! Shifted list of local addresses to skip SPF from hard coded to a config option. * Changed default (no config file) TempError defer to False to match docs and default in config file. ! Refactored Whitelisting/SPF skipping code for reduced size and better extensibility and maintainability. + Added Forwarder Domain SPF Whitelist + Added Restriction Class mode to return only SPF result to Postfix + Return link to SPF "Why" page for reject/defer actions. --- 0.4.1 (2007-08-13 11:00 -0400) * Correct multi-recipient caching to work for multi-recipient rejections --- 0.4 (2007-07-09 17:24) + Process HELO first and reject if allowed before looking up Mail From + Log failure to find SPF library ! Rationalize text of logging and comments back to Postfix - any script that parses logs from this program automatically will need to be updated. * Remove obsolete code for using non-Python SPF libraries + Activate support for config files (refactored legacy code) ! Change PermError default from Reject to Prepend - Reject on PermError was inconsistent with traditional SPF usage. ! Remove obsolete undistributed files from SVN trunk ! Remove INSTALL file (redundant to man 1 policyd-spf) * Adjust master.cf recommendations in INSTALL for new recommendations from Weitse Venema (postfix-users mailing list). * Change indentation from tabs to spaces in legacy code + Support case insensitive SPF results as required by RFC 4408. + SPF results reported with initial capitalization. + Add SPF whitelist facility in config file --- 0.3 (2007-02-23 11:54) * Refactored and simplified SPF results reporting/logging * Changed logging to match RFC 4408 SPF-Received: terminology * Fixed processing to skip SPF for localhost connections to work for IPv6 + Implemented prepending of SPF-Received: header. + Added man page (man 1 policyd-spf) --- 0.2 (2007-02-07 16:50) * Changed skip local connections to use CIDR match rather than string. * Log non-fail/error results to syslog --- 0.1 (2007-01-17 18:00) ! Initial release ! Removed greylisting ! Stubbed out config files until they can be updated and integrated + Defer on temperror + Reject on permerror + Check HELO for null Sender (Mail From) --- 0.0 Source from Tumgreyspf (2007-01-11 00:00) ! Source Tumgreyspf Version 1.24 pypolicyd-spf-0.5.1/policyd-spf.10000644000175000017500000002240610705451404017060 0ustar kittermakitterma\" .\" Standard preamble: .\" ======================================================================== .de Sh \" Subsection heading .br .if t .Sp .ne 5 .PP \fB\\$1\fR .PP .. .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' 'br\} .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . nr % 0 . rr F .\} .\" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .hy 0 .if n .na .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "policy-spf 1" .TH policy-spf 1 "2007-10-17" .SH "NAME" python-policyd-spf \- pure-Python Postfix policy daemon for SPF checking .SH "VERSION" .IX Header "VERSION" 0\.5\.1 .SH "USAGE" .IX Header "USAGE" NOTE: Depending on the packaging and distribution, the exact path to the executable may vary. The executable should be included in the Python path. $ policyd-spf [Start with package defaults] $ policyd-spf \-h [Display usage message] $ policyd-spf /usr/local/policyd-spf/policyd-spf.conf [Config file name to use] Configuration options are described in the sample configuration file provided with the package policyd-spf.conf(5). The provided setup.py installs this configuration file in /usr/local/policyd-spf/. Additionally, whitelisting certain IP addresses or IP addresses used by listed domains from SPF checks is supported. Skipping SPF checks for local submission or trusted relays is also provided. The sample configuration file and policyd-spf.conf(5) shows the format to use. .SH "OTHER DOCUMENTATION" .IX Header "OTHER DOCUMENTATION" This documentation assumes you have read Postfix's README_FILES/ SMTPD_POLICY_README and are generally familiar with Sender Policy Framework (SPF). See RFC 4408 for details. See policyd-spf.conf(5) for configuration file information. .SH "SYNOPSIS" .IX Header "SYNOPSIS" python-policyd-spf is a Postfix SMTPd policy daemon for SPF checking. It is implemented in pure Python and uses the pyspf module. The SPF web site is http://www.openspf.org/. The Postfix configuration must be changed to check SPF. .SH "DESCRIPTION" .IX Header "DESCRIPTION" Logging is sent to syslogd. Each time a Postfix SMTP server process is started it connects to the policy service socket and Postfix runs one instance of this Python script. By default, a Postfix SMTP server process terminates after 100 seconds of idle time, or after serving 100 clients. Thus, the cost of starting this Python script is smoothed over time The default policy_time_limit is 1000 seconds. This may be too short for some SMTP transactions to complete. As recommended in SMTPD_POLICY_README, this should be extended to 3600 seconds. To do so, set "policy_time_limit = 3600" in /etc/postfix/main.cf. Messages that get a Fail SPF result will be rejected. Messages that get a Permerror are, by default, treated as if they had no SPF record. Messages that get a Temperror result are, by default, treated as if they had no SPF record, but can (and probably should) be deferred if otherwise permitted. Messages that get other SPF results (Pass, None, Neutral, Softfail) will have the SPF Received header prepended. Note: Spamasassisn 3.2 and follow will use this header for spam scoring so there is no need to configure a separate SPF check in these Spamassassin versions. See Spamassassin documentation for details. Default Mail From rejection/deferal criteria are, by design, conservative. Default HELO check actions are to reject mail with other than Pass/None. HELO records are much simpler than Mail From records and rejecting based on HELO checking does not present a false positive risk. These settings are a matter of local policy and should be adjusted to meet the requirements of site administrators. See policyd-spf.conf(5) for configuration file details. .SH "LOGGING" .IX Header "LOGGING" Policyd-spf will log messages to syslog about it's activities. The "debugLevel" value in "policyd-spf.conf" can be increased to get additional information to be logged. When set to a value of "0", only test results (SPF hits/misses) are logged. Results will be returned to Postfix and logged as a warning by Postfix also. For logging by this policy server, look for "policyd-spf" in your mail log files. .SH "TESTING THE POLICY DAEMON" .IX Header "TESTING THE POLICY DAEMON" Testing the policy daemon To test the policy daemon by hand, execute: policyd-spf Each query is a bunch of attributes. Order does not matter, and the daemon uses only a few of all the attributes shown below: request=smtpd_access_policy protocol_state=RCPT protocol_name=SMTP helo_name=some.domain.tld queue_id=8045F2AB23 instance=12345.6789 sender=foo@bar.tld recipient=bar@foo.tld client_address=1.2.3.4 client_name=another.domain.tld [empty line] The policy daemon will answer in the same style, with an attribute list followed by a empty line: action=dunno [empty line] .SH "POSTFIX INTEGRATION" .IX Header "POSTFIX INTEGRATION" 1. Add the following to /etc/postfix/master.cf: policyd-spf unix - n n - 0 spawn user=nobody argv=/usr/bin/python /usr/bin/policyd-spf NOTE: Check the path to both the installed Python interpreter and policyd-spf. These vary from system to system. To use non-default settings, you must also add the config file (see above and policyd-spf.conf(5) for details). 2. Configure the Postfix policy service in /etc/postfix/main.cf: smtpd_recipient_restrictions = ... reject_unauth_destination check_policy_service unix:private/policyd-spf ... policyd-spf_time_limit = 3600 NOTE: Specify check_policy_service AFTER reject_unauth_destination or else your system can become an open relay. 3. Reload Postfix. .SH "SEE ALSO" .IX Header "SEE ALSO" policyd-spf.conf(5), python-spf, , RFC 4408 .SH "AUTHORS" .IX Header "AUTHORS" This version of \fBpython-policyd-spf\fR was written by Copyright (c) 2007 Scott Kitterman . It is derived from Tumgreyspf, written by Sean Reifschneider, tummy.com, ltd . Portions of the documentation were written by Meng Weng Wong . .PP This man-page was created by Scott Kitterman . pypolicyd-spf-0.5.1/policyd-spf0000755000175000017500000004025710705470061016730 0ustar kittermakitterma#!/usr/bin/python # # Check SPF results and provide recommended action back to Postfix. # # Tumgreyspf source # Copyright (c) 2004-2005, Sean Reifschneider, tummy.com, ltd. # # # pypolicyd-spf # Copyright (c) 2007, Scott Kitterman ''' This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.''' __version__ = "0.5.1: October 17, 2007" import syslog, os, sys, string, re, time, popen2, urllib, stat, errno, socket, spf sys.path.append('/usr/local/lib/policy-spf') import policydspfsupp syslog.openlog(os.path.basename(sys.argv[0]), syslog.LOG_PID, syslog.LOG_MAIL) policydspfsupp.setExceptHook() ############################################# def cidrmatch(connectip, ipaddrs, n): """Match connect IP against a list of other IP addresses. From pyspf.""" try: if connectip.count(':'): MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFL connectip = spf.inet_pton(connectip) for arg in ipaddrs: ipaddrs[ipaddrs.index(arg)] = spf.inet_pton(arg) bin = spf.bin2long6 else: MASK = 0xFFFFFFFFL bin = spf.addr2bin c = ~(MASK >> n) & MASK & bin(connectip) for ip in [bin(ip) for ip in ipaddrs]: if c == ~(MASK >> n) & MASK & ip: return True except socket.error: pass return False def parse_cidr(cidr_ip): """Breaks CIDR notation into a (address,cidr,cidr6) tuple. The cidr defaults to 32 if not present. Derived from pyspf""" import re RE_DUAL_CIDR = re.compile(r'//(0|[1-9]\d*)$') RE_CIDR = re.compile(r'/(0|[1-9]\d*)$') a = RE_DUAL_CIDR.split(cidr_ip) if len(a) == 3: cidr_ip, cidr6 = a[0], int(a[1]) else: cidr6 = None a = RE_CIDR.split(cidr_ip) if len(a) == 3: cidr_ip, cidr = a[0], int(a[1]) else: cidr = None b = cidr_ip.split(':', 1) if len(b) < 2: return cidr_ip, cidr return a[0], cidr6 ############################################# def spfbypass(data, check_type, configData): if configData.get(check_type): ip = data.get('client_address') bypass_list = (str(configData.get(check_type))) bypass_list_list = bypass_list.split(',') if check_type == 'skip_addresses' or check_type == 'Whitelist': for cidr in bypass_list_list: parsed_address = parse_cidr(cidr) good_ip = [parsed_address[0],] cidr_range = parsed_address[1] if not parsed_address[1]: cidr_range = 32 if cidrmatch(ip, good_ip, int(cidr_range)): if check_type == 'skip_addresses': comment = 'SPF check N/A for local connections - ' else: comment = 'SPF skipped for whitelisted relay - ' Header = ('X-Comment: ' + comment + 'client-ip=%s; helo=%s; envelope-from=%s; receiver=%s ' % ( data.get('client_address', ''), data.get('helo_name', ''), data.get('sender', ''), data.get('recipient', ''), )) if debugLevel >= 2: syslog.syslog(Header) return (True, Header) else: return (False, 'None') elif check_type == 'Domain_Whitelist': for domain in bypass_list_list: res = spf.check2(ip, domain, domain) res[0] = res[0].lower() res[0] = res[0].capitalize() if res[0] == 'Pass': comment = 'SPF skipped for whitelisted relay domain - ' Header = ('X-Comment: ' + comment + 'client-ip=%s; helo=%s; envelope-from=%s; receiver=%s ' % ( data.get('client_address', ''), data.get('helo_name', ''), data.get('sender', ''), data.get('recipient', ''), )) if debugLevel >= 2: syslog.syslog(Header) return (True, Header) else: return (False, 'None') ############################################# def spfcheck(data, instance_dict, configData): #{{{1 debugLevel = configData.get('debugLevel', 0) ip = data.get('client_address') if ip == None: if debugLevel: syslog.syslog('spfcheck: No client address, exiting') return(( None, None, instance_dict )) # Do not check SPF for localhost addresses skip_check = spfbypass(data, 'skip_addresses', configData) if skip_check[0]: return (('prepend', skip_check[1], instance_dict )) # Whitelist designated IP addresses from SPF checks (e.g. secondary MX or # known forwarders. ip_whitelist = spfbypass(data, 'Whitelist', configData) if ip_whitelist: return (('prepend', ip_whitelist[1], instance_dict )) #recipient = data.get('recipient') receiver=socket.gethostname() sender = data.get('sender') helo = data.get('helo_name') if not sender and not helo: if debugLevel: syslog.syslog('spfcheck: No sender or helo, exiting') return(( None, None, instance_dict )) # start query spfResult = None spfReason = None instance = data.get('instance') # The following if is only needed for testing. Postfix # will always provide instance. if not instance: import random instance = str(int(random.random()*100000)) # This is to prevent multiple headers being prepended # for multi-recipient mail. found_instance = instance_dict.has_key(instance) '''Data structure for results is a list of: [0] SPF result [1] SPF reason [2] Identity (HELO/Mail From) [3] Action based on local policy [4] Header''' if not found_instance: Mail_From_pass_restriction = configData.get('Mail_From_pass_restriction') HELO_pass_restriction = configData.get('HELO_pass_restriction') # First do HELO check # if no helo name sent, use domain from sender for later use. if not helo: foo = string.split(sender, '@', 1) if len(foo) < 2: helo = 'unknown' else: helo = foo[1] else: if configData.get('HELO_reject') != 'No_Check': helo_fake_sender = 'postmaster@' + helo res = spf.check2(ip, helo_fake_sender, helo) helo_result = [res[0], res[1]] helo_result.append('HELO') helo_result[0] = helo_result[0].lower() helo_result[0] = helo_result[0].capitalize() if debugLevel: syslog.syslog('spfcheck: pyspf result: "%s"' % str(helo_result)) if configData.get('HELO_reject') == 'Null' and sender: helo_result.append('dunno') elif helo_result[0] == 'Temperror' and configData.get('TempError_Defer') == 'True': helo_result.append('defer') elif helo_result[0] == 'Permerror' and configData.get('PermError_reject') == 'True': helo_result.append('reject') elif helo_result[0] == 'Permerror' and configData.get('PermError_reject') == 'False': helo_result('prepend') elif configData.get('HELO_reject') == 'Fail' and helo_result[0] == 'Fail': helo_result.append('reject') elif configData.get('HELO_reject') == 'SPF_Not_Pass' and (helo_result[0] == 'Fail' or helo_result[0] == 'Softfail' or helo_result[0] == 'Neutral'): helo_result.append('reject') helo_result[1] = 'SPF HELO result: rejected due to local policy (Not Pass/None)' else: helo_result.append('prepend') if sender == '': header_sender = '<>' else: header_sender = sender spfDetail = (helo_result[2] + ' client-ip=%s; helo=%s; envelope-from=%s; receiver=%s ' % ( ip, helo, header_sender, data.get('recipient', ''))) syslogData = helo_result[1] + ": " + spfDetail syslogData = str(syslogData) syslog.syslog(syslogData) header = 'Received-SPF: '+ helo_result[0] + ' (' + helo_result[1] +') ' + spfDetail helo_result.append(header) instance_dict[instance] = helo_result if HELO_pass_restriction and helo_result[0] == 'Pass': restrict_name = HELO_pass_restriction # Only act on the HELO result if it is authoritative. if helo_result[3] == 'reject': header = "Message rejected due to: " + helo_result[1] + ". Please see http://www.openspf.org/Why?s=helo;id=" + helo + ";ip=" + ip + ";r=" + data.get('recipient') return(( 'reject', header, instance_dict )) if helo_result[3] == 'defer': header = "Message deferred due to: " + helo_result[1] + ". Please see http://www.openspf.org/Why?s=helo;id=" + helo + ";ip=" + ip + ";r=" + data.get('recipient') return(( 'defer', header, instance_dict )) # Second do Mail From Check if sender == '': if configData.get('HELO_reject') != 'No_Check': if helo_result[3] == 'reject': header = "Message rejected due to: " + helo_result[1] + ". Please see http://www.openspf.org/Why?s=helo;id=" + helo + ";ip=" + ip + ";r=" + data.get('recipient') if helo_result[3] == 'defer': header = "Message deferred due to: " + helo_result[1] + ". Please see http://www.openspf.org/Why?s=helo;id=" + helo + ";ip=" + ip + ";r=" + data.get('recipient') if HELO_pass_restriction and helo_result[0] == 'Pass': restrict_name = HELO_pass_restriction return('result_only', restrict_name, instance_dict) return(( helo_result[3], header, instance_dict )) else: if configData.get('Mail_From_reject') != 'No_Check': res = spf.check2(ip, sender, helo) mfrom_result = [res[0], res[1]] mfrom_result.append('Mail From') mfrom_result[0] = mfrom_result[0].lower() mfrom_result[0] = mfrom_result[0].capitalize() if debugLevel: syslog.syslog('spfcheck: pyspf result: "%s"' % str(mfrom_result)) mfrom_result.append('dunno') if mfrom_result[0] == 'Temperror' and configData.get('TempError_Defer') == 'True': mfrom_result[3] = 'defer' elif mfrom_result[0] == 'Permerror' and configData.get('PermError_reject') == 'True': mfrom_result[3] = 'reject' elif mfrom_result[0] == 'Permerror' and configData.get('PermError_reject') == 'False': mfrom_result[3] = 'prepend' elif configData.get('Mail_From_reject') == 'Fail' and mfrom_result[0] == 'Fail': mfrom_result[3] = 'reject' else: mfrom_result[3] = 'prepend' if mfrom_result[0] != 'None': spfDetail = \ (mfrom_result[2] + ' client-ip=%s; helo=%s; envelope-from=%s; receiver=%s ' % ( ip, helo, sender, data.get('recipient', ''))) syslogData = mfrom_result[1] + ": " + spfDetail syslogData = str(syslogData) syslog.syslog(syslogData) header = 'Received-SPF: '+ mfrom_result[0] + ' (' + mfrom_result[1] +') ' + spfDetail mfrom_result.append(header) instance_dict[instance] = mfrom_result if (Mail_From_pass_restriction and mfrom_result[0] == 'Pass') or (HELO_pass_restriction and helo_result[0] == 'Pass'): if mfrom_result[0] == 'Pass': restrict_name = Mail_From_pass_restriction return('result_only', restrict_name, instance_dict) # Act on the Mail From result if it is authoritative. if mfrom_result[3] == 'reject': header = "Message rejected due to: " + mfrom_result[1] + ". Please see http://www.openspf.org/Why?s=mfrom;id=" + sender + ";ip=" + ip + ";r=" + data.get('recipient') return(( 'reject', header, instance_dict )) if mfrom_result[3] == 'defer': header = "Message deferred due to: " + mfrom_result[1] + ". Please see http://www.openspf.org/Why?s=mfrom;id=" + sender + ";ip=" + ip + ";r=" + data.get('recipient') return(( 'defer', header, instance_dict )) if mfrom_result[3] != 'dunno' or helo_result[3] =='dunno': return(( 'prepend', header, instance_dict )) else: cached_instance = instance_dict[instance] if cached_instance[3] == 'prepend': return(( 'dunno', 'Header already pre-pended', instance_dict )) else: return(( cached_instance[3], cached_instance[4], instance_dict )) return(( 'None', 'None', instance_dict )) ################################################### # load config file {{{1 configFile = None if len(sys.argv) > 1: if sys.argv[1] in ( '-?', '--help', '-h' ): print 'usage: policyd-spf []' sys.exit(1) configFile = sys.argv[1] configGlobal = policydspfsupp.processConfigFile(filename = configFile) # loop reading data {{{1 debugLevel = configGlobal.get('debugLevel', 0) if debugLevel >= 2: syslog.syslog('Starting') instance_dict = {'0':'init',} instance_dict.clear() data = {} lineRx = re.compile(r'^\s*([^=\s]+)\s*=(.*)$') while 1: line = sys.stdin.readline() if not line: break line = string.rstrip(line) if debugLevel >= 4: syslog.syslog('Read line: "%s"' % line) # end of entry {{{2 if not line: if debugLevel >= 4: syslog.syslog('Found the end of entry') configData = configGlobal if debugLevel >= 2: syslog.syslog('Config: %s' % str(configData)) # run the checkers {{{3 checkerValue = None checkerReason = None checkerValue, checkerReason, instance_dict = spfcheck(data, instance_dict, configData) if configData.get('SPFSEEDONLY', 0): checkerValue = None checkerReason = None # handle results {{{3 if checkerValue == 'reject': sys.stdout.write('action=550 %s\n\n' % checkerReason) elif checkerValue == 'prepend': sys.stdout.write('action=prepend %s\n\n' % checkerReason) elif checkerValue == 'defer': sys.stdout.write('action=defer_if_permit %s\n\n' % checkerReason) elif checkerValue == 'warn': sys.stdout.write('action=warn %s\n\n' % checkerReason) elif checkerValue == 'result_only': sys.stdout.write('action=%s\n\n' % checkerReason) else: sys.stdout.write('action=dunno\n\n') # end of record {{{3 sys.stdout.flush() data = {} continue # parse line {{{2 m = lineRx.match(line) if not m: syslog.syslog('ERROR: Could not match line "%s"' % line) continue # save the string {{{2 key = m.group(1) value = m.group(2) if key not in [ 'protocol_state', 'protocol_name', 'queue_id' ]: value = string.lower(value) data[key] = value pypolicyd-spf-0.5.1/policydspfsupp.py0000644000175000017500000001243310704311610020173 0ustar kittermakitterma# # Tumgreyspf # Copyright (c) 2004-2005, Sean Reifschneider, tummy.com, ltd. # # pypolicyd-spf changes # Copyright (c) 2007, Scott Kitterman ''' This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.''' import syslog, os, sys, string, re, time, popen2, urllib, stat # default values defaultConfigData = { 'debugLevel' : 0, 'defaultSeedOnly' : 1, 'HELO_reject' : 'SPF_Not_Pass', 'Mail_From_reject' : 'Fail', 'PermError_reject' : 'False', 'TempError_Defer' : 'False', 'skip_addresses' : ['127.0.0.0/8', '::ffff:127.0.0.0//104', '::1//128',] } ################################# class ConfigException(Exception): '''Exception raised when there's a configuration file error.''' pass #################################################################### def processConfigFile(filename = None, config = None, useSyslog = 1, useStderr = 0): '''Load the specified config file, exit and log errors if it fails, otherwise return a config dictionary.''' import policydspfsupp if config == None: config = policydspfsupp.defaultConfigData if filename != None: try: readConfigFile(filename, config) except Exception, e: if useSyslog: syslog.syslog(e.args[0]) if useStderr: sys.stderr.write('%s\n' % e.args[0]) sys.exit(1) return(config) ################# class ExceptHook: def __init__(self, useSyslog = 1, useStderr = 0): self.useSyslog = useSyslog self.useStderr = useStderr def __call__(self, etype, evalue, etb): import traceback, string tb = traceback.format_exception(*(etype, evalue, etb)) tb = map(string.rstrip, tb) tb = string.join(tb, '\n') for line in string.split(tb, '\n'): if self.useSyslog: syslog.syslog(line) if self.useStderr: sys.stderr.write(line + '\n') #################### def setExceptHook(): sys.excepthook = ExceptHook(useSyslog = 1, useStderr = 1) #################### def quoteAddress(s): '''Quote an address so that it's safe to store in the file-system. Address can either be a domain name, or local part. Returns the quoted address.''' s = urllib.quote(s, '@_-+') if len(s) > 0 and s[0] == '.': s = '%2e' + s[1:] return(s) ###################### def unquoteAddress(s): '''Undo the quoting of an address. Returns the unquoted address.''' return(urllib.unquote(s)) ############################################################### commentRx = re.compile(r'^(.*)#.*$') def readConfigFile(path, configData = None, configGlobal = {}): '''Reads a configuration file from the specified path, merging it with the configuration data specified in configData. Returns a dictionary of name/value pairs based on configData and the values read from path.''' debugLevel = configGlobal.get('debugLevel', 0) if debugLevel >= 3: syslog.syslog('readConfigFile: Loading "%s"' % path) if configData == None: configData = {} nameConversion = { 'debugLevel' : int, 'defaultSeedOnly' : int, 'HELO_reject' : str, 'Mail_From_reject' : str, 'PermError_reject' : str, 'TempError_Defer' : str, 'Mail_From_pass_restriction' : str, 'HELO_pass_restriction' : str, 'Whitelist' : str, 'skip_addresses': str, 'Domain_Whitelist' : str } # check to see if it's a file try: mode = os.stat(path)[0] except OSError, e: syslog.syslog('ERROR stating "%s": %s' % ( path, e.strerror )) return(configData) if not stat.S_ISREG(mode): syslog.syslog('ERROR: is not a file: "%s", mode=%s' % ( path, oct(mode) )) return(configData) # load file fp = open(path, 'r') while 1: line = fp.readline() if not line: break # parse line line = string.strip(string.split(line, '#', 1)[0]) if not line: continue data = map(string.strip, string.split(line, '=', 1)) if len(data) != 2: syslog.syslog('ERROR parsing line "%s" from file "%s"' % ( line, path )) continue name, value = data # check validity of name conversion = nameConversion.get(name) if conversion == None: syslog.syslog('ERROR: Unknown name "%s" in file "%s"' % ( name, path )) continue if debugLevel >= 5: syslog.syslog('readConfigFile: Found entry "%s=%s"' % ( name, value )) configData[name] = conversion(value) fp.close() return(configData) pypolicyd-spf-0.5.1/README0000644000175000017500000000306110700751746015430 0ustar kittermakittermaPython Postfix Policy for SPF (python-policy-spf) 0.5 Python based policy daemon for Postfix SPF checking Tumgreyspf source Copyright (c) 2004-2005, Sean Reifschneider, tummy.com, ltd. python-policyd-spf changes Copyright (c) 2007, Scott Kitterman Documentation inputs: Copyright (c) 2004-2005, Sean Reifschneider, tummy.com, ltd. 2003-2004 Meng Weng Wong from postfix-policyd-spf-perl Copyright (c) 2007, Scott Kitterman ================= This is python-policyd-spf, an external policy checker for the postfix mail server. It will use pyspf to check SPF records to determine if email should be rejected by your server. To install from the tar.gz (is this software has been packaged for your distribution, the packaged version is recommended and should be installed using your normal distribution packaging tools): 1. Extract the package from the tarball (tar -xvvzf ...) 2. Enter the package directory (cd ...) 3. python setup.py build 4. As root python setup.py install The pyspf (python-spf) library version 2.0 or higher is required for this policy server. If it's not available through your packaging system, it can be downloaded from: http://sourceforge.net/projects/pymilter/ Nothing is configured by default, so this will not interact with Postfix until it has been set up. See man 1 policyd-spf for information on setting up and using this policy server. See man 5 policyd-spf.conf for configuration file information. pypolicyd-spf-0.5.1/policyd-spf.conf0000644000175000017500000000457710704313743017660 0ustar kittermakitterma# Amount of debugging information logged. 0 logs no debugging messages # 5 includes all debug messages. debugLevel = 0 # If set to 0, no messages are rejected by SPF. This allows you to see the # potential impact of SPF checking in your mail logs without rejecting mail. defaultSeedOnly = 1 # HELO check rejection policy. Options are: # HELO_reject = SPF_Not_Pass (default) - Reject if result not Pass/None/Tempfail. # HELO_reject = Fail - Reject only on HELO Fail # HELO_reject = Null - Only reject HELO Fail for Null sender (SPF Classic) # HELO_reject = False - Never reject on HELO, append header only. # HELO_reject = No_Check - Never check HELO. HELO_reject = SPF_Not_Pass # HELO pass restriction policy. # HELO_pass_restriction = helo_passed_spf - Apply the given restriction when # the HELO checking result is Pass. The given restriction must be an # action as defined for a Postfix SMTP server access table access(5). HELO_pass_restriction # Mail From rejection policy. Options are: # Mail_From_reject = Fail - Reject only on Mail From Fail # Mail_From_reject = False - Never reject on Mail From, append header only # Mail_From_reject = No_Check - Never check Mail From/Return Path. Mail_From_reject = Fail # Mail From pass restriction policy. # Mail_From_pass_restriction = mfrom_passed_spf - Apply the given # restriction when the Mail From checking result is Pass. The given # restriction must be an action as defined for a Postfix SMTP server # access table access(5). Mail_From_pass_restriction # Policy for rejecting due to SPF PermError. Options are: # PermError_reject = True # PermError_reject = False PermError_reject = False # Policy for deferring messages due to SPF TempError. Options are: # TempError_Defer = True # TempError_Defer = False TempError_Defer = False # Do not check SPF for localhost addresses - add to skip addresses to # skip SPF for internal networks if desired. Defaults are standard IPv4 and # IPv6 localhost addresses. skip_addresses = 127.0.0.0/8, ::ffff:127.0.0.0//104, ::1//128 # Whitelist: CIDR Notation list of IP addresses not to check SPF for. # Example (default is no whitelist): # Whitelist = 192.168.0.0/31, 192.168.1.0/30 # Domain_Whitelist: List of domains whose sending IPs should be whitelisted # from SPF. # Example (default is no domain whitelist): # Domain_Whitelist = pobox.com, trustedforwarder.org pypolicyd-spf-0.5.1/policyd-spf.conf.50000644000175000017500000003226110705451430020007 0ustar kittermakitterma\" .\" Standard preamble: .\" ======================================================================== .de Sh \" Subsection heading .br .if t .Sp .ne 5 .PP \fB\\$1\fR .PP .. .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' 'br\} .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . nr % 0 . rr F .\} .\" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .hy 0 .if n .na .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "policy-spf.conf 5" .TH policy-spf.conf 5 "2007-10-15" .SH "NAME" python-policyd-spf \- pure-Python Postfix policy daemon for SPF checking .SH "VERSION" .IX Header "VERSION" 0\.5\.1 .SH "USAGE" .IX Header "USAGE" Usage: policyd-spf /usr/local/policyd-spf/policyd-spf.conf [Config file name to use] .SH "OTHER DOCUMENTATION" .IX Header "OTHER DOCUMENTATION" This documentation assumes you have read Postfix's README_FILES/ SMTPD_POLICY_README and are generally familiar with Sender Policy Framework (SPF). See RFC 4408 for details. man 1 policyd-spf provides general operation documentation for this package. .SH "SYNOPSIS" .IX Header "SYNOPSIS" python-policyd-spf operates with a set of default configuration options. These options can be changed through use of configuration files. .SH "DESCRIPTION" .IX Header "DESCRIPTION" Configuration options are described here and in the sample configuration file provided with the package. The provided setup.py installs this configuration file in /usr/local/policyd-spf/. Additionally, whitelisting certain IP addresses from SPF checks is supported. The this man page and the sample configuration file show the format to use. .SH "OPTIONS" .IX Header "OPTIONS" .SH "LOGGING" .IX Header "LOGGING" "debugLevel" controls ths amount of information logged by the policy server. The default, 0, logs no debugging messages, just basic SPF results and errors generated through the policy server. This value can be increased up to 5 (values higher than 5 will not cause an error, but will not log any additional information). debug level 1 adds a log message if no client address (IP address from which the connection was made), Mail From addresss, or HELO/EHLO name is received by the policy server, and logs SPF results for each Mail From and HELO check. debug level 2 generates a log message each time the policy server starts and each time it exits, as well as logging an copy of the exact header returned to Postfix to be prepended into the message. Each time the policy server starts, debug level 2 also logs the configuration information used by the policy server. debug level 3 logs each config file read (with file name and path). debug level 4 logs the complete data set received by Postfix via the policy interface and when the end of the entry is read. debug level 5 logs each configuration attribute read from a configuration file. Default: debugLevel = 0 .SH "TEST OPERATION" .IX Header "TEST OPERATION" The policy server can operate in a test only mode. This allows you to see the potential impact of SPF checking in your mail logs without rejecting mail. Headers are prepended in messages, but message delivery is not affected. This mode is not enabled by default. To enable it, set defaultSeedOnly = 0. Default: defaultSeedOnly = 1 .SH "HELO/EHLO CHECKING" .IX Header "HELO/EHLO CHECKING" HELO check rejection policy options are: SPF_Not_Pass (default) - Reject if result not Pass/None/Tempfail. Unlike Mail From checking, there are no standard e-mail use cases where a HELO check should not Pass if there is an SPF record for the HELO name (transparent forwarding, for example, is not an issue). Technically this option is not fully RFC 4408 compliant since the Mail From identity is mandatory, but HELO/EHLO is known first in the SMTP dialogue and there is no practical reason to waste resources on Mail From checks if the HELO check will already cause the message to be rejected. Fail - Reject only on HELO Fail. Technically this option is not fully RFC 4408 compliant since the Mail From identity is mandatory, but HELO/EHLO is known first in the SMTP dialogue and there is no practical reason to waste resources on Mail From checks if the HELO check will already cause the message to be rejected. Null - Only reject HELO Fail for Null sender (SPF Classic). This is the approach used by the pre-RFC 4408 reference implementation and many of the pre- RFC specifications. Use of at least this option (SPF_Not_Pass or Fail) are preferred) is highly recommended. False - Never reject on HELO, append header only. This is useful for post-SMTP spam filters such as SpamAssassin. No_Check - Never check HELO. This is only recommended if you are calling the policy server twice (once for HELO checks and once for Mail From) with two different configuration files. This approach is useful to get both the HELO and Mail From headers prepended to a message. Default: HELO_reject = SPF_Not_Pass .SH "HELO/EHLO PASS RESTRICTION" .IX Header "HELO/EHLO PASS RESTRICTION" HELO Pass Restriction allows integration with other Postfix access contlols by provding a user supplied name of a postfix access restriction to be applied to a message when the HELO checking result is Pass. The indicated restriction must be an action as defined for a Postfix SMTP server access table access(5) and explained in the Postfix RESTRICTION CLASS README. Example: HELO_pass_restriction = helo_passed_spf Default: None .SH "Mail From CHECKING" .IX Header "Mail From CHECKING" Mail From rejection policy options are: Fail - Reject only on Mail From Fail. False - Never reject on Mail From, append header only. This is useful for post-SMTP spam filters such as SpamAssassin. No_Check - Never check Mail From/Return Path. This is only recommended if you are calling the policy server twice (once for HELO checks and once for Mail From) with two different configuration files. This approach is useful to get both the HELO and Mail From headers prepended to a message. It could also be used to do HELO checking only (because HELO checking has a lower false positive risk than Mail From checking), but this approach would not be fully RFC 4408 compliant since the Mail From identity is mandatory. Default: Mail_From_reject = Fail .SH "Mail From PASS RESTRICTION" .IX Header "Mail From PASS RESTRICTION" Mail From Pass Restriction allows integration with other Postfix access contlols by provding a user supplied name of a postfix access restriction to be applied to a message when the HELO checking result is Pass. The indicated restriction must be an action as defined for a Postfix SMTP server access table access(5) and explained in the Postfix RESTRICTION CLASS README. Example: mail_from_pass_restriction = helo_passed_spf Default: None .SH "PERMANENT ERROR PROCESSING" .IX Header "PERMANENT ERROR PROCESSING" Policy for rejecting due to SPF PermError options are: True - Reject the message if the SPF result (for HELO or Mail From) is PermError. This has a higher short-term false positive risk, but does result in senders getting feedback that they have a problem with their SPF record. False - Treat PermError the same as no SPF record at all. This is consistet with the pre-RFC usage (the pre-RFC name for this error was "Unknown"). Default: PermError_reject = False .SH "TEMPORARY ERROR PROCESSING" .IX Header "TEMPORARY ERROR PROCESSING" Policy for deferring messages due to SPF TempError options are: True - Reject the message if the SPF result (for HELO or Mail From) is TempError. This is the traditional usage and has proven useful in reducing acceptance of unwanted messages. Sometimes spam senders do not retry. Sometimes by the time a message is retried the sending IP has made it onto a DNS RBL and can then be rejected. This is not the default because it is possible for some DNS errors that are classified as "Temporary" per RFC to be permanent in the sense that they require operator intervention to correct. False - Treat TempError the same as no SPF record at all. This is the default to minimize false positive risk. Default: TempError_Defer = False .SH "LOCAL SPF BYPASS LIST" .IX Header "LOCAL SPF BYPASS LIST" Do not check SPF for localhost addresses - add to skip addresses to skip SPF for internal networks if desired. Defaults are standard IPv4 and IPv6 localhost addresses. This can also be used, to allow mail from local clients submitting mail to an MTA also acting as a Mail Submission Agent (MSA) to be skipped. An x-header is prepended indicating SPF checks were skipped due to a local address. This is a trace header only. Default: skip_addresses = 127.0.0.0/8, ::ffff:127.0.0.0//104, ::1//128 .SH "SPF IP WHITELIST" .IX Header "SPF IP WHITELIST" A comma separated CIDR Notation list of IP addresses not to skip SPF checks for. Use this list to whitelist trusted relays (such as a secondary MX and trusted forwarders). An x-header is prepended indicating the IP was whitelisted against SPF checks. This is a trace header only. Example: Whitelist = 192.168.0.0/31, 192.168.1.0/30 Default: None .SH "SPF DOMAIN WHITELIST" .IX Header "SPF DOMAIN WHITELIST" Domain_Whitelist: List of domains whose sending IPs should be whitelisted from SPF checks. Use this to list trusted forwarders by domain name. Client IP addresses are tested against SPF records published by the listed domains. This is useful for large forwarders with complex outbound infrastructures and SPF records. This option is less scalable than the SPF IP Whitelist. An x-header is prepended indicating the IP was whitelisted against SPF checks. This is a trace header only. This option does nothing if the domain does not have an SPF record. In this case use the SPF IP Whitelist described above. Example: Domain_Whitelist = pobox.com, trustedforwarder.org Default: None .SH "SEE ALSO" .IX Header "SEE ALSO" man 1 policyd-spf, python-spf, , RFC 4408 .SH "AUTHORS" .IX Header "AUTHORS" This version of \fBpython-policyd-spf\fR was written by Copyright (c) 2007 Scott Kitterman . It is derived from Tumgreyspf, written by Sean Reifschneider, tummy.com, ltd . Portions of the documentation were written by Meng Weng Wong . .PP This man-page was created by Scott Kitterman . pypolicyd-spf-0.5.1/README.per_user_whitelisting0000644000175000017500000000751410705450462022050 0ustar kittermakittermaThis document illustrates applying different SMTPD Access Restrictions for different recipients depending upon whether a message gets SPF Pass. An understanding of at least the following Postfix documents and associated man pages is required. RESTRICTION_CLASS_README SMTPD_ACCESS_README SMTPD_POLICY_README The Postfix RESTRICTION_CLASS_README opens with the following example illustrating the use of different restrictions for different recipients. /etc/postfix/main.cf: smtpd_restriction_classes = restrictive, permissive # With Postfix < 2.3 specify reject_unknown_client. restrictive = reject_unknown_sender_domain reject_unknown_client_hostname ... permissive = permit smtpd_recipient_restrictions = permit_mynetworks reject_unauth_destination check_recipient_access hash:/etc/postfix/recipient_access /etc/postfix/recipient_access: joe@my.domain permissive jane@my.domain restrictive The example below illustrates using this policy-spf daemon with the Postfix "check_policy_service" access restriction to apply the "permissive" restriction only to messages getting SPF Pass. /etc/python-policyd-spf/policyd-spf.conf: HELO_pass_restriction = passed_spf Mail_From_pass_restriction = passed_spf /etc/postfix/master.cf: policyd-spf unix - n n - 0 spawn user=nobody argv=/usr/bin/python /usr/bin/policyd-spf /etc/postfix/main.cf: smtpd_restriction_classes = restrictive, permissive, passed_spf restrictive = reject_unknown_sender_domain reject_unknown_client_hostname ... permissive = permit passed_spf = check_recipient_access hash:/etc/postfix/recipient_access restrictive smtpd_recipient_restrictions permit_mynetworks reject_unauth_destination check_policy_service unix:private/policyd-spf restrictive policyd-spf_time_limit = 3600 /etc/postfix/recipient_access: joe@my.domain permissive jane@my.domain restrictive The "check_policy_service" can apply only one action at a time. Consequently, the above example will not insert a Received-SPF header field into a message getting SPF pass. One way to work around this is to apply the "check_policy_service" restriction a second time as shown below. /etc/python-policyd-spf/policyd-spf.conf: HELO_pass_restriction = passed_spf Mail_From_pass_restriction = passed_spf /etc/python-policyd-spf/policyd-spf-fin.conf: HELO_reject = False Mail_From_reject = False /etc/postfix/master.cf: policyd-spf unix - n n - 0 spawn user=nobody argv=/usr/bin/python /usr/bin/policyd-spf policyd-spf-fin unix - n n - 0 spawn user=nobody argv=/usr/bin/python /usr/bin/policyd-spf /etc/python-policyd-spf/policyd-spf-fin.conf /etc/postfix/main.cf: smtpd_restriction_classes = restrictive, permissive, passed_spf restrictive = reject_unknown_sender_domain reject_unknown_client_hostname ... permissive = permit passed_spf = check_policy_service unix:private/policyd-spf-fin check_recipient_access hash:/etc/postfix/recipient_access restrictive smtpd_recipient_restrictions permit_mynetworks reject_unauth_destination check_policy_service unix:private/policyd-spf restrictive policyd-spf_time_limit = 3600 policyd-spf-fin_time_limit = 3600 /etc/postfix/recipient_access: joe@my.domain permissive jane@my.domain restrictive