Improving ticket category attribution based on mail collector

Hi,

Could a solution be thought to improve collecting emails from different mail folders without having to setup multiple collectors to have them placed in specific glpi categories??

With the actual version of glpi, those are the possibilities : : 

-business rules allow detection of the subject, however an email subject from an external party/client, is not something in general which you want to change/touch

-business rule based on collector's email adress is ok, however setting up several collectors to have their specific folder inspected could maybe be done in a more pragmatic way.

In a better world of course gmails, thunderbird, etc, would have a similar header field for tags and labels and then an easy rule could be added :)

Thank you for your time