dnsblcount
Count RBL rejections in Postix log
wassup
Host monitor
xmas list maker
Interactive xmas list editor for the whole family
pmpass
Poor man's pop authentication system for sendmail
Nolisting
Poor Man's Greylisting
Unlisting
Port Knocking for SMTP
SMTP AUTH with sendmail
Quick start guide for Red Hat Linux
Installing a Thawte SSL123 Certificate
Quick start guide for Slackware Linux