[Mailman-Developers] Cute TMDA use

[J C Lawrence]

You can front a list with TMDA, pointing TMDA at your list's subscriber
base and a local whitelist.  TMDA then passes all subscriber mails
straight thru to the list, but mail from non-subscribers is held until
confirmed (at which point you can whitelist or not).

The TMDA lists do this to decent effect.

Nice side effects:

  No more problems with posters from non-subscribed addresses.  They
  have a subscription to _GET_ mail and to define an allowed posting
  address.  They can (trivially) define additional allowed posting
  addresses by just posting from them and confirming the post to get on
  the whitelist.  You're now essentially back in the old days of the
  1980s when we could safely run open lists.

  Almost all SPAM disappears. They don't confirm.  

  Ditto viruses.

Well some viruses might learn confirming down the road, but none do now
and the confirmation steps can be trivially changed.

-- 
J C Lawrence                
- ---------(*)                Satan, oscillate my metallic sonatas. 
claw@kanga.nu               He lived as a devil, eh?		  
http://www.kanga.nu/~claw/  Evil is a name of a foeman, as I live.