[Mailman-Users] Member receives rejected message but message goes through

[Hung Phan]

Hello,

We have a moderated list with 325 members. The list is set to reject  
post from moderated members with a custom rejected message. A member  
is set to allow sending. Every time this person send message through  
the list, it kicks back a rejected message to the user but the message  
goes through. The reject message that the user receive is generic from  
Mailman.

You are not allowed to post to this mailing list, and your message has
been automatically rejected.  If you think that your messages are
being rejected in error, contact the mailing list owner.

We double-check and the user doesn't have the mod option checked. The  
user is also enlisted in "List of non-member addresses whose postings  
should be automatically accepted."

Where can we find the file that keep the user mod setting? Has anyone  
experience this issue? Solution?

Thank you very much for your advice,