(re-posting a comment I have just made on an 'implemented' feature request thread)
We would like to be able to include character prefixes in ticket numbers on a per-group basis, and have these appear in the subject lines of all emails that Freshdesk sends, to (a) distinguish tickets from our own Freshdesk account from tickets created by other systems and (b) see at a glance which group a ticket is in. So a ticket number that currently appears as [#12345] in an email subject line, could be made to appear as (for example) [SUP12345] if it was in the support group and [OPS12345] if it was in the operations group. JIRA does this quite well.

