[ Thanks to Falko
Timme for this link. ]
“In this guide you will learn how to tweak the default Falko
mail guide for Postfix (+Auth SMTP + Quota),
http://www.howtoforge.com/virtual_postfix_mysql_quota_courier,
setup to better combat SPAM and allow a little bit of backward
compatibilty of the older Qmail systems.“So let’s get started…”