[Mailman-Users] Hold message on implicit destination - except from list members

[Joel Heenan]

Mailman-Users,

The feature to hold messages with implicit destination helps us a lot
because a good percentage of spam does not list the list in the headers.
However occasionally list members like to send messages to the list
without the list as a recipient (for various mostly valid reasons) and
it would be good to be able to handle this case. Is it possible that we
always allow list members through and only hold non-list members?

If possible I would like to avoid doing this with regex.

Thanks
-- 
Joel Heenan