[rt-users] Template/Email correspondance subject line help

[Ryan Stark]

I'm looking for documentation on Templates, is there any? Also,
specifically, how do you remove the [my.domain.com] from the subject
line? I got this far:

RT-Attach-Message: yes
Subject: {$Ticket->QueueObj-> Description} - Tracking #:{$Ticket->id}

{$Transaction->Content()}

but I can't get rid of the bracketed domain [my.domain.com].

Anyone know how?

Thanks,
-Ryan