[otrs] Use of ticket free text fields in responses

[Stelios Maistros]

Hello,

Is it possible to use the user defined ticket free text fields, such as
"TicketFreeText1" 
in a response, similar to the use of "<OTRS_CUSTOMER_UserEmail>" ?

I have a ticket free text field in which I store IP addresses and I
would like it to be included in the responses I send.

I have tried different combinations of OTRS_TICKET_FREE, etc, but it
does not seem to work.

Any ideas ?

Thank you,

Stelios