DKIMproxy is an SMTP-proxy that signs and/or verifies emails, using the Mail::DKIM module. It is designed for Postfix, but should work with any mail server. It comprises two separate proxies, an "outbound" proxy for signing outgoing email, and an "inbound" proxy for verifying signatures of incoming email. With Postfix, the proxies can operate as either Before-Queue or After-Queue content filters.
iptables -t nat -A PREROUTING -p tcp --dport 587 -j REDIRECT --to-ports 25
The Postfix SMTP server receives mail from the network and is exposed to the big bad world of junk email and viruses. This document introduces the built-in and external methods that control what SMTP mail Postfix will accept, what mistakes to avoid, and h
The Perfect Setup - Debian Etch (Debian 4.0) - Page 5 | HowtoForge - Linux Howtos and Tutorials
Tips für Postfix, wenn er zuviele Anfragen bekommt und die Abarbeitung zu lange dauert
Disable your css before visiting! Mail server HOWTO - Postfix and Dovecot with MySQL and TLS/SSL, Postgrey and DSPAM
Verschiedene Verfahren um selektiv postfix + amavis Spam checks auszuschalten
