Postfix

Postfix is a free and open-source software that acts as a mail server for GNU/Linux and UNIX-like systems. It's built in C and is a solid alternative to Sendmail.

Junk Mail Control Features

This software comes packed with features to help control junk mail. It supports the Sendmail Milter protocol, which makes it easier to filter out unwanted emails. Plus, it has stress-dependent configuration options, a postscreen zombie blocker, and even Greylisting plugins that can help reduce spam.

Advanced Security Measures

Postfix also includes several security features like access control per recipient, sender or client, an SPF plugin to verify email senders, content filtering, and DNS whitelist support. It's designed to handle multiple connections from clients at the same time while managing rate limits for each one.

Supports Various Protocols

The software supports many protocols, making it versatile. You'll find support for IPv6, TLS (Transport Layer Security), SMTP (Simple Mail Transfer Protocol), LMTP (Local Mail Transfer Protocol), QMQP (Quick Mail Queueing Protocol), SASL (Simple Authentication and Security Layer), and ETRN (Extended SMTP).

Database Support

Postfix works with various databases too! This includes LMDB, Memcache, CDB, PostgreSQL, SQLite, LDAP databases, Berkeley DB, MySQL, and DBM. This flexibility means you can choose the best database for your needs.

Email Management Options

You can manage your emails easily as Postfix supports popular mailbox formats like mailbox and maildir. It even allows virtual domains so you can customize your email setup.

Other Cool Features

Among its other features are support for VERP envelope return addresses and masquerading addresses in outgoing SMTP mail. You can also rewrite addresses selectively based on different conditions. Plus, it offers customizable delivery status notifications!

Cross-Platform Compatibility

This software is truly cross-platform! Postfix has been tested on many POSIX systems including GNU/Linux, BSDs like FreeBSD or OpenBSD, Solaris variants like SunOS or SmartOS; AIX; HP-UX; IRIX; Mac OS X; and Tru64 UNIX. It's compatible with both 32-bit and 64-bit architectures too!

Your Next Step!

If you're looking to download Postfix, you're making a smart choice! This powerful tool is used by many hosting services worldwide.