[ Thanks to Joe
Topjian for this link. ]
“By using Transports with Postfix, you can add a lot of
flexibility and customization to how your mail is handled. In Part
Two of this series, I described how to use Transports in
conjunction with the spamc program to tag email as either spam or
ham. While spamc does a great job at tagging, it doesn’t provide
any features beyond that–such as delivery options, quarantining,
and virus scanning. As a result, more robust scripts and packages
have been created to provide these extra features. Before I cover
some of those packages, I’d like to explain how to write a custom
spam filtering script…”