Sounds like the other "lists" are configured so that the "from"
address is the poster, and not the list. Since a poster to the
other list may not be a subscriber to your list, your list holds
it for administrative approval.
If you know the people who run the other lists, then you might be
able to
I have set up a number of lists using Mailman. All is well except
for the following problem. Some of my lists have other lists subscribed
to them (in addition to individual email addresses -- so they are not
entirely lists of lists). Message pass through fine to the individual
subscribers, but
