Making Postfix config changes on the fly

MTA

Postfix

This example shows how to update the aliases path so we have this standard across all machines in a datacentre, this is a quick hack method. The correct way to fix this in a production would be to use a configuration management system like chef/puppet or cfengine.

    PATH=$PATH:/opt/csw/bin:/opt/csw/sbin:/usr/local/bin:/usr/local/postfix/sbin
    export PATH

## Show the existing aliases paths

    postconf | grep '^alias'

## Make the changes to main.cf

    postconf -e alias_maps='dbm:/etc/mail/aliases'
    postconf -e alias_database='dbm:/etc/mail/aliases'

## Make new aliases database

    newaliases

## Show aliases paths just to make sure things have been updated

    postconf | grep '^alias'

## send test email to self

    uname -a | mailx -s "`uname -n`" pcanham@`uname -n`