postconf
Display and modify Postfix configuration
TLDR
Use alternate config directory
$ postconf -c [path/to/config_dir]
Edit configuration parameters$ postconf -e
Show default settings$ postconf -d
Show parameters from specific class$ postconf -C [builtin|service|user|all]
List SASL plugin types$ postconf -a
List lookup table types$ postconf -m
SYNOPSIS
postconf [-c dir] [-d] [-e] [-C class] [parameters...]
DESCRIPTION
postconf displays and modifies Postfix mail server configuration. It reads and writes main.cf parameters, shows default values, and reports configuration warnings.The tool validates parameter names and warns about typos. It's essential for administering Postfix without manually editing configuration files.
PARAMETERS
-c _directory_
Alternate configuration directory-d
Show default parameter values-e
Edit main.cf with name=value pairs-C _class_
Filter by parameter class-a
List available SASL plugin types-m
List available lookup table types-n
Show only parameters with non-default values
INSTALL
sudo apt install postfix
sudo dnf install postfix
sudo pacman -S postfix
sudo apk add postfix
sudo zypper install postfix
nix profile install nixpkgs#postfix
CAVEATS
Changes via -e require postfix reload to take effect. Some parameters require restart. Modifying running server config requires care. Backup configuration before major changes.
HISTORY
postconf is part of Postfix, the mail transfer agent created by Wietse Venema as a secure alternative to Sendmail. It provides safe configuration management for the complex mail system.
