[otrs] Changing Subject

[Kamal]

Greetings,
I am using OTRS 2.1.6.

When I am using Empty Response when replying to a TT, the default subject is
the following:
Re: [Ticket#2007102410000039] <subject written>

If I delete the "Re: [Ticket#2007102410000039]" from the subject & send the
email, the email is sent with the "Re: [Ticket#2007102410000039]" appended
automatically.

How can I force OTRS not to change the subject that I send?
I need to do the above since some recipients don't accept message except
with specific subjects.

Regards
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