I am currently installing Mailman as a replacement for majordomo. Mostly everything is going smoothly.
I have a question regarding umbrella lists. I have 4 "real" mailing lists and 5 aliases that redirect to some or all of these lists.
For the sake of explanation let's call the "real" lists : A-staff A-vis B-staff B-vis
The 5 aliases are (and send to -> ) all -> A-staff, B-staff, A-vis, B-vis all-staff -> A-staff, B-staff all-vis -> A-vis, B-vis A-all -> A-staff, A-vis B-all -> B-staff, B-vis
The 4 "real" lists are all moderated due to increasing spam and forged addresses.
The problem: If a message goes to one of the aliases then the message must be moderated at-least twice or at worst four times. I would like to moderate a message once.
What solutions are available? Are there solutions entirely within the scope of Mailman?
I have instrumented a solution using umbrella lists (for the aliases) and some clever procmail rules, but would like to know what others have done in similar situations.