Vernon Schryver <vjs(_at_)calcite(_dot_)rhyolite(_dot_)com> wrote:
The common mode that you would outlaw is where people send from one
IP address with an unrelated envelope Mail_From value.
No one has used the word "outlaw". The recipient MTA would decide
what to do with an SMTP session when the originator lies to it.
Maybe the IETF ends up with an RFC saying such lies MUST NOT occur,
but who really pays attention to RFC requirements?
Another common case involves people traveling. If you plug your laptop
into the network of a hotel or one of your consulting clients, you
might prefer to use an envelope and From header address at your home
systems instead of room1234(_at_)losangeles(_dot_)merriot(_dot_)com or
guest(_at_)example(_dot_)com(_dot_)
Despite Dave Crockers assertions to the contrary, other solutions
for roaming users exist, than lying in SMTP transactions. Even his
comments against webmail "not scaling" are trivially and obviously
wrong: Hotmail. It has tens of millions, and dare I say, approaching
100 million users.
That existing solution address ALL of the concerns with roaming
users requiring email access (but NOT necessarily SMTP), and with
scalability to 100's of millions of users. The fact that you,
personally, probably hate web mail is your issue, and doesn't negate
the underlying truth of the argument for changing the behaviour of
roaming users.
Alan DeKok.
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