PUBLIC MARKS with tags postfix & backup

n this tutorial I will show how you can set up a Postfix mailserver as a backup mail exchanger for a domain so that it accepts mails for this domain in case the primary mail exchanger is down or unreachable, and passes the mails on to the primary MX once that one is up again.

Domain Technologie Control (DTC) is a GPL control panel for hosting. Using a web GUI for admin and accounting all hosting services, DTC can delegate the task of creating subdomains, email, and FTP accounts to users for the domain names they own. DTC manages a MySQL database containing all the hosting information. It has support for many programs (bind 8 and 9 and compatibles, MySQL, Apache 1.3, php4, qmail, postfix 2, courier, dovecot, proftpd, webalizer, mod-log-sql, etc.) through config files and/or MySQL plugins (when the service is non-critical). It can also generate backup scripts, calculation scripts, and config files using a single system UID/GID and monitor all traffic accounting per user and per service. Since version 0.12, DTC is fully skinable and translated into several languages (Chinese, English, Spanish, French, Dutch, German, Italian, Russian, Hungarian, Romanian and Polish).