[Mailman-Developers] Headers in administrative messages

It might be nice to get the List-id header in messages to the administrator. I have a spam white-listing rule for list messages and I'm finding some of my auto-discard notifications are ending up in my spam folder instead of my administrator folder because they lack the list id pattern I use to white list.

It might also be nice to have some kind of digital signature header that signs another dynamic header, such that an admin or regular list recipient can check the signature to verify that it's really from the list.