Why? Couldn't consent information be sent as part of the RCPT TO:
using the <rcpt-parameters> as defined in RFC2821?
MAIL FROM: <legitbulker(_at_)legit(_dot_)domain>
RCPT TO: <user1(_at_)your(_dot_)domain> permission-given=blah1
RCPT TO: <user2(_at_)your(_dot_)domain> permission-given=blah blah
I guess so. If someone takes the trouble of defining this extension.
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