claws-mail-perl-filter 3.8.1-2ubuntu2 (amd64 binary) in ubuntu raring

 This plugin enables filtering of Claws Mail messages using perl
 regular expresions and, in fact, giving all the perl features and power
 to the filtering engine.
 .
 A tool for converting the current filter set of the user into a equivalent
 perl script suitable for the plugin is also provided.