Basierend auf den [https://blog.plitc.eu/2014/ispconfig-remove-sensitive-information-from-email-headers-with-postfix/ Blogpost] von [[Benutzer:Daniel.plominski|Daniel]] wollte ich meinen Postfix anweisen in Email die sensitive Informationen (Email Client IP usw.) zu bereinigen. == Beispiel == === IPv4 ===
Return-Path:=== IPv6 === ==== Thunderbird ====Delivered-To: Received: from server.example.com by example.com (Dovecot) with LMTP id abc1De23F4G5HIJKlMNopq for ; Sun, 19 Jan 2014 16:20:08 +0100 Received: from [192.168.18.10] (wiki.c3d2.example.net [192.168.18.10]) (Authenticated sender: c3d2) by server.example.com (Postfix) with ESMTPSA id 12ABC3D4567; Sun, 19 Jan 2014 16:20:07 +0100 (CET) Message-ID: <1234A5B6.7890123@example.net> Date: Sun, 19 Jan 2014 16:20:07 +0100 From: c3d2 wiki User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Herr F Steinel Subject: test Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 8bit test
Return-Path:==== Mutt ====Delivered-To: Received: from server.example.com by example.com (Dovecot) with LMTP id abc1De23F4G5HIJKlMNopq for ; Thu, 09 Apr 2015 19:19:41 +0200 Received: from [IPv6:2a00:1828:a008:103:6883:eefe:4240:6042] (unknown [IPv6:2a00:1828:a008:103:6883:eefe:4240:6042]) (Authenticated sender: c3d2) by server.example.com (Postfix) with ESMTPSA id 12ABC3D4567 for ; Thu, 9 Apr 2015 19:19:41 +0200 (CEST) Message-ID: <1234A5B6.7890123@example.net> Date: Thu, 09 Apr 2015 19:19:37 +0200 From: c3d2 wiki User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Herr F Steinel Subject: test Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit test
Return-Path:== header_checks_auth.pcre ==Delivered-To: Received: from server.example.com by example.com (Dovecot) with LMTP id abc1De23F4G5HIJKlMNopq for ; Thu, 16 Apr 2015 19:01:03 +0200 Received: from mediamaster.example.net (unknown [IPv6:2a00:1828:a008:103:c802:e416:38c3:9462]) (Authenticated sender: c3d2) by server.example.com (Postfix) with ESMTPSA id 12ABC3D4567 for ; Thu, 16 Apr 2015 19:01:03 +0200 (CEST) Date: Thu, 16 Apr 2015 19:01:01 +0200 From: c3d2 wiki To: Herr F Steinel Subject: test Message-ID: <1234A5B6.7890123@mediamaster.example.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Clacks-Overhead: GNU Terry Pratchett test
if /^Received:/ #ipv6+thunderbird /\s+from\s+\[IPv6:2a00:1828:a008:103:[\dA-F:]+\]\s+\(unknown\s\[IPv6:2a00:1828:a008:103:[\dA-F:]+\]\)(.*)/ REPLACE Received: from [127.0.0.1] (localhost [127.0.0.1])$1 #ipv6+mutt /\s+from\s+[[:alpha:][:digit:]]+\.example\.com\s+\(unknown\s\[IPv6:2a00:1828:a008:103:[\dA-F:]+\]\)(.*)/ REPLACE Received: from [127.0.0.1] (localhost [127.0.0.1])$1 #ipv4 /\s+from\s+\[[.[:digit:]]{7,15}]\s+\([^)][[:alpha:][:digit:]]+\.example\.com\s\[192\.[.[:digit:]]{5,11}\]\)(.*)/ REPLACE Received: from [127.0.0.1] (localhost [127.0.0.1])$1 #print info on EVERY RECEIVED line #/\s+/ INFO "Received found" endif /^\s*Mime-Version: 1\.0\.\w+/ REPLACE MIME-Version: 1.0 /^\s*User-Agent/ IGNORE /^\s*X-Enigmail/ IGNORE /^\s*X-Mailer/ IGNORE /^\s*X-Originating-IP/ IGNORE== Tests == Testen der Einstellungen mit
postmap -hmq - pcre:/etc/postfix/header_checks_auth.pcre < testdatei
{| class="wikitable"
|-
! Parameter !! Erläuterung
|-
| -h || Enable message header query mode.
|-
| -m || Enable MIME parsing
|-
| -q || Search the specified maps
|-
| - || If a key value of - is specified, the program reads key values from the standard input stream and writes one line of key value output for each key that was found.
|}
== Links ==
*[http://article.gmane.org/gmane.mail.postfix.user/194538 "if endif" syntax]
*[http://home.deds.nl/~aeron/regex/ ipv6 regex]
*[https://git-ipuppet.immerda.ch/module-postfix/tree/templates/anonsasl_header_checks.erb puppet module für postfix] inkl. configuration Parameter "anon_sasl" um IP aus dem EMail-Header zu löschen