[Mailman-Users] mailman-request at domain1.com request not processing

[Ki Song]

I've sent a request email to an existing (I think) list on my mailman
server: mailman-request at mail.knifecenter.com

My postfix server log shows this:
delivered to command: /usr/local/mailman/mail/mailman request mailman

however, I am not getting the help request that I asked for sent to the
e-mail address that is requesting this information.

What is happening?