Starting Guide for Postfix Mail Server Configuration Supporting Anti Spam and Anti Virus

This work provides starting guide for simple Postfix mail server configuration. Then  I configured the Postfix mail server to support Anti-Spam and Anti-Virus, using two methods.

Method 1: With Postfix, SpamAssassin, ClamAV and Amavis-new
Method 2: With Postfix, SpamAssassin, ClamAV and Procmail

The report includes the following sections
1. How Postfix receives mail:
2. How Postfix delivers mail
3. Starting guide for quick Postfix configuration
4. Postfix mail server and Dovecot configuration
5. Installing ClamAV and SpamAssassin
6. Installing and configuring Squirrelmail:
7. Method 1 to support Antivirus and Antispam: Using Postfix, Amavis-new, ClamAV, SpamAssassin
8. Method 2 to support Antivirus and Antispam: Using Postfix, Procmail, ClamAV, SpamAssassin