PrePflog FAQ
Q. What are the prerequisites for using PrePflog?
There are no additional prerequisites beyond those needed for Plogsumm.
Q. Are there any other ways available of solving the problem?
Postfix now supports multi-instances. It would be possible to use a different instance of Postfix to manage the post filter processing and customize the logging. Then Awstats or Pflogsumm could be run only on the logging of the first pass through Postfix.
Q. When reporting a problem what information should I provide?
Please see here