Implementations
Two versions of Email Prioritization were developed during the research; one based on sendmail and the other on postfix.
Postfix has many advantages over sendmail, particularly when implementing the Email Prioritization scheme. If possible, we would strongly recommend using postfix.
Having been published at USENIX in 2004, Email Prioritization is in the public domain, and any developer if free to write code based on the ideas presented.
When I have done so, some example code should appear here;
In the meantime, please feel free to read some articles.