Ticket Display Question

When viewing a ticket in 3.8.1, you have the section “More about
username@domain.com” this is helpful if you have a large number of
people emailing your rt instillation, however the way ours is setup we
only have 2 or 3 email addresses that send to us, that are forwards from
others. What I have been looking for is if it is possible to change
"More about username@domain.com" to something that is more useful maybe
displaying items with similar subjects, or similar custom fields
instead. Is this something possible, where would the changes need to be
made? Thanks in advance.

Regards,
Chris Newcomb