Postfix DNS Addon


Example scenario:

Domain name "" is pointed via DNS MX entry to the MTA Server "" (anti spam server).

The anti spam server is just a transport server, to check the mail for spam and forward it to the REAL MX Server

which is "". For this procedure, postfix needs 4 settings: "virtual_alias_maps", "relay_recipient_maps",

"transport_maps" and "relay_domains". In the right now version it is done my mysql:. As for this, its needed to

do 3 mysql queries to: domain_relay, virtual_user (catchall), transport (destination mx) per domain name.

The new solution should be over DNS Query Requests. A domain name has 2 entries. One standard MX Entry with the

antispam server. And an additional TXT entry with an encrypted string which contains the destination mx (transport).

Thats all. I the encrypted string is existing, postfix accepts the domain (relay_domains) and takes all receptions

(virtual_alias_maps) and knows from the encrypted string the destination mx (transport_maps).

The closer details (about encrypted string, and so on) will be discussed on start. Basically it must be a very fast addon, not much to do, just to understand the postfix source code.

Thats all.

Skills: C Programming

See more: postfix addon, test scenario, string standard, standard string, forward domain dns, postfix, dns, check spam, postfix antispam mysql, virtual_alias_maps, domain name check, code dns server, dns name server, catchall mail, source destination, standard procedure, dns settings, anti spam source code, dns server source, destination, spam settings, postfix server, source code mysql, mysql query example, dns server example

About the Employer:
( 21 reviews ) Chisinau, Moldova, Republic of

Project ID: #239033