Ticket # in email address?

Is there any possibility of routing emails to an existing ticket by
including the ticket # in the email address? Something like,
"rt+12345@reed.edu" that would treat emails sent to that address the
same as if they included the rt ticket # in the subject.

Here’s the scenario I have in mind:

-An RT ticket exists.
-We need to provide an email address to a vendor and would like their
emails to automatically be associated with the existing ticket.
-Currently, if we give them "rt@reed.edu" then every time they email us
a new ticket is generated and must be merged.
-However, if we could give them an email address that includes the
ticket number then all their replies would be part of the existing ticket.

Thanks,
Josh

Is there any possibility of routing emails to an existing ticket by
including the ticket # in the email address? Something like,
“rt+12345@reed.edu” that would treat emails sent to that address the same
as if they included the rt ticket # in the subject.

Possibly via a milter or mail-alias-that-calls-procmail-or-suchlike that
would make the necessary extraction on the fooTTNUM@example.edu To address
and then update the Subject or whatnot of the message as necessary before
feeding the adjusted message off to RT?

Is there any possibility of routing emails to an existing ticket by
including the ticket # in the email address? Something like,
“rt+12345@reed.edu” that would treat emails sent to that address the
same as if they included the rt ticket # in the subject.

This is what the “–extension ticket” argument for rt-mailgate is for
http://bestpractical.com/docs/rt/latest/rt-mailgate.html#extension-OPTIONAL

It’s up to your MTA to set the environment variable $EXTENSION when
dealing with a +addressed mail, but most do so automagically.

People use this both to support rt+12345@example.com as well as
12345@rt.example.com, the latter requires more MTA shenanigans than
the former.

-kevin