OT:Relays: Dumb question

[John Lawson]

   So I have a classic naive question:

Why does there not exist a 'throttling mechanism' at every step, counting 
e-mails per minute, and directing messages above that threshold (and that 
are 'substantially similar)' to dev\null.

   If an organization has a legitimate and documented reason to send more 
than, say 5 or 10 'substantially similar' messages per unit time - then 
let them be "licensed" (for want of a better term) and subject to whatever 
controls are available....

  That would simply stop bulk mailers cold -  of course it's easy to 
conceive of these things when one has no concept of how the "system" works 
as whole...  which I of course most assuredly do not.


Cheers

John