I can't find where you configure the email message on forum posts.
Forum participant says this-->
"I clicked the link to reply to this email, but I could not reply on the forum,
because the admin locked the function. "
It sounds like they are trying to respond to the email. However, the email address from which forum messages are sent is "unmonitored"...we want people to use the forum...not email. The sending email address is "not a real email".
How can we edit the email and tell people, "Don't Do this"?