Auto assign tickets from email to entities for known senders

When a ticket is received from a known email address it is not automatically assigned to the entity of the user associated with that email address. I cannot imagine a scenario whereby a ticket from a user would need to be associated with a entity other than that which the users belongs to.

I can create rules to assigned the entity for tickets based on the sender's email address, and this works easily for those using a corporate domain however when a user's email address is GMAIL, or similar, then he rules need to be updated constantly as new users are added.

As the information to achieve this is already in GLPI I would like to see an option that would allow tickets received via email for known senders to be auto assigned to the correct entity.