The question was what can a mailman list admin do. I don't see another answer,
I wrote a shim that goes between Sympa (like Mailman only French) and the MTA in an afternoon that does per-user From: line rewriting. I wrote some stuff to do message wrapping in another afternoon.
I don't think I'm a particularly brilliant programmer, and I have no doubt that if the IETF found a technical approach we prefer, we could easily implement it.
Regards, John Levine, johnl@xxxxxxxxx, Taughannock Networks, Trumansburg NY Please consider the environment before reading this e-mail. https://jl.ly