[dev] Ticket number in X-HEADER

Hi to everyone, I'm an otrs newbie since few days and I plan to use it, but I would like to know if there is a way to force otrs to put/get ticket number into/from email header cause most people in my company found that ticket number in subject is too "administrative" and people often take-off the subject from emails. Of course I've looked at history but I've not found any answers. I know that is possible to force OTRS to look for ticket number in reply-to ( PostmasterFollowUpSearchInReferences) our in body but just in case of follow-up. Regards, Antoine