[Mailman-Users] Trouble posting to a list

[Martin Dennett]

I have a member of a list that I run who is not in the banned members, 
and is trying the very simple task of posting a mail to that list. He's 
forwarding me a copy of the mail and it is obviously being addressed 
correctly. Trouble is, the mail is not hitting the list, it's not 
getting sent to the administrator for approval (which it shouldn't 
anyway as there are no conditions that would cause it to), and the 
sender is not getting any mail back as to why his post is not reaching 
the list. I've even unsubbed and resubbed the member to no avail.

Anybody got any ideas please?

Regards

Martin Dennett