Keith Moore wrote:
users should be able to set the From field on a per-message basis.
(it's not forgery if the address belongs to you)
In at least some situations, using a "work" address in messages
sent from "home" or vice versa or similar dichotomies would
likely be looked upon with a jaundiced eye; far worse in some
cases.
Now you might say "forge From" instead of using Reply-To, but that
won't work with some times of authentication and spam filtering.
most forms of spam filtering are too broken to use anyway. and any
authentication mechanism that restricts the setting of From is broken.
From is clearly not intended to be used for that purpose.
In some cases, the setting that affects the From header field also
affects SMTP MAIL FROM, and that is sometimes (rightly or wrongly)
used as a weak form of authentication.