There's been discussion of ENVID on this list.
Brett Watson said:
By ENVID, I take it that you mean RFC 3461. The last flurry of
Many apologies. I was thinking of ORCPT, I claim a transient defect in
RFC 3461 (5.1(b)) forbids rejection on
the basis of the ORCPT or NOTIFY parameters to RCPT (except for
"A conforming SMTP server MUST NOT refuse a RCPT command based on the
presence or absence of any of these parameters."
Which isn't quite the same thing.
But then, I still can't see what's wrong with tweaking the MAIL FROM.
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