Postfix Debugging Howto
Purpose of this document
This document describes how to debug parts of the Postfix mail
system when things do not work according to expectation. The methods
vary from making Postfix log a lot of detail, to running some daemon
processes under control of a call tracer or debugger.
The text assumes that the Postfix main.cf and master.cf
configuration files are stored in directory /etc/postfix. You can
use the command "postconf
config_directory" to find out the
actual location of this directory on your machine.
Listed in order of increasing invasiveness, the debugging
techniques are as follows: