[Mailman-Users] Input text when admin rejected mail

[Mak Dara]

I want to input my own text, when i reject mail. when i put it into "If you reject this post,
please explain (optional) " box, it's display like message below:

"Your request to the Gender mailing list

    Posting of your message titled "Hi"

has been rejected by the list moderator.  The moderator gave the
following reason for rejecting your request:

"Your mail has been rejected.

The gender mailing list is to be used as electronic means to share
information and knowledge, and to discuss on gender issues in
Cambodia. Any mail on non-related issues will be rejected."

Any questions or comments should be directed to the list administrator
at:    gender-owner at lists.open.org.kh"

But when i rejected message, i want to send message below to sender 
"Your mail has been rejected. 

The gender mailing list is used as electronic communication mean to share information and knowledge, and to discuss on gender mailing issues on Cambodia. Any mail on non-related topic will be rejected. "

Please shard me your experience

Dara