When in Content filtering Section I set Reject as Action to take when a message matches the content filtering rules, then the sender of the message, which was rejected, receives the following e-mail from Mailman: "The message's content type was not explicitly allowed"

How could I change that message? Is there any form where I could put new text of the message, and if there is no form, could you please add it in future version of Mailman?

ak