> CL> What about using a combination of the Message-Id: and username?
I just don't see the point. You can work as hard as you want trying to
detect duplicates on a single server, but users are still going to get dups
from lists hosted on different servers, or even from the same server if
their subscription address varies a little bit.
We know how to do client end filtering, and it actually works. Why reinvent
a wheel that at best will only be about 1/2 round?
John Levine, firstname.lastname@example.org, Primary Perpetrator of "The Internet for Dummies",
Information Superhighwayman wanna-be, http://iecc.com/johnl, Sewer Commissioner
Finger for PGP key, f'print = 3A 5B D0 3F D9 A0 6A A4 2D AC 1E 9E A6 36 A3 47