E-mail forwarding is at odds with the centralized nature of the internet.
Why do we even need to bother with concessions for forwarders? Forwarders can
adapt. Forwarders can be whitelisted by the receiver or they can store instead
of forward.
"But, what about all that lost mail due to SPF failures?"
How about a protocol for tagging e-mail. E-mail should never be filtered, only
tagged. I don't know about everyone else, but I don't want some stranger
deciding which mail is junk and which is not. A fail or softfail can result in
a subject line tag of [POSSIBLE FORGERY]. When SPF implementation becomes
ubiquitous, rules can become more strict. Even neutral mail could be tagged. In
conjuction with domain blacklisting this can be a very effective approach.
Forwarded mail would not be lost during adaptation.
Servers will be able to reliably filter mail, but not anytime soon. Let's stop
filtering mail and give the users the power to decide.
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