This is a text-only version of the following page on https://raymii.org: --- Title : Postfix: log message from, to and subject Author : Remy van Elst Date : 28-03-2009 URL : https://raymii.org/s/tutorials/Postfix_Log_message_from_to_and_subject_headers.html Format : Markdown/HTML --- This is a little trick for Postfix, it lets you log the `subject`, `from` and `to` of all the emails postfix sends (or which pass through it if you run it as a relay). It comes in handy when you need to debug an email issue and need to confirm your mailserver has sent the message.

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First create the file `/etc/postfix/header_checks` and insert this into it: /^subject:/ WARN /^to:/ WARN /^from:/ WARN /^Subject:/ WARN /^To:/ WARN /^From:/ WARN Now, in your postfix `/etc/postfix/main.cf` add the following to the end of the file: header_checks = regexp:/etc/postfix/header_checks And restart postfix: service postfix restart You will hopefully now get log items like below, and if not you have a problem with your mailserver: Dec 4 08:23:05 localhost postfix/cleanup[2278]: 90CA714: warning: header Subject: This is a testmail which gets logged from localhost[127.0.0.1]; from= to= proto=ESMTP helo= [1]: https://www.digitalocean.com/?refcode=7435ae6b8212 --- License: All the text on this website is free as in freedom unless stated otherwise. This means you can use it in any way you want, you can copy it, change it the way you like and republish it, as long as you release the (modified) content under the same license to give others the same freedoms you've got and place my name and a link to this site with the article as source. This site uses Google Analytics for statistics and Google Adwords for advertisements. You are tracked and Google knows everything about you. Use an adblocker like ublock-origin if you don't want it. All the code on this website is licensed under the GNU GPL v3 license unless already licensed under a license which does not allows this form of licensing or if another license is stated on that page / in that software: This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. 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, see . Just to be clear, the information on this website is for meant for educational purposes and you use it at your own risk. I do not take responsibility if you screw something up. Use common sense, do not 'rm -rf /' as root for example. If you have any questions then do not hesitate to contact me. See https://raymii.org/s/static/About.html for details.