On 4 Dec 2001, at 5:18, Eric S. Raymond wrote:
Paul Dickson <dickson(_at_)permanentmail(_dot_)com>:
A piece of mail is considered duplicate if it has the same message-ID
as the message immediately preceding and more than one addressee.
How about including Sender: into this determining factor? Sender: is set
to the mailing list address.
How would this help? Under what circumstances could an MTA send two messages
with the same Message-ID vut different Sender headers?
What about messages without Message-ID headers? It wasn't that
many years ago that I got in an argument with an admin of a large
network that didn't bother to put IDs on outgoing messages -- as far
as he was concerned, external recipients/MTAs ability to disambiguate
messages wasn't *his* problem....
DG