Michael Welzl wrote:
I don't understand that. I have seen wide agreement that we
don't want to specify behavior #1, so why do you call this
Because the practice of automatic purging already exist without any
flags, and clearly without user permission. That is reality.
This proposal attempts to introduce a new header that would require a
change and alteration ($$$) of this existing design and practice.
IMO, this is asking much more than what is realistically more
possible, which is to simply state:
Servers which employ automatic purging of old messages
MAY let this field influence the purging process.
Once there is a criteria of user permission, I think you can run into
an ugly game of users having a false illusion of controls they never
had in the first place.