[Exim] insert line in body by filter

Hi,


I´m using exim 3.16 on a linux box.
Is there a possibility to add a line to the message body
depending on the recipient??
I´ve tried the following line in the system filter and
user filter:

add "password: jaja" to $message_body

I think that $message_body is only for testing
and read only.
Is there a possibility to append a line to the body???



Thanx for help


Andre Esser
--
Andre Esser
andre@???