[Mailman-Users] members mail is getting marked rejected

[Andy Goldzweig]

in the vette log I see:
        LISTNAME: Refused posting:
        From: MEMBER at MYDOMAIN
        Subject: SUBJECT
        Reason: Your message was deemed inappropriate by the moderator.
This person is a member of the list.
The sender filter for moderated members is hold
So why is the message getting rejected?
How else can I track down what is causing this so I can help the user to
send a 'good' message?

Andy