Hector Santos wrote:
On the contrary, it is the Sender header if present that should
be the decider,
Who says?
STD 11. In Dave's classic "secy@ example" boss@ tells secy@
to send mail "from boss@ to somebody@". The boss@ won't tell
secy@ which mail route to use, secy@ decides these details.
News/Email gateways don't apply as well.
NAK.
No, SENDER nor Resent-* anything is guaranteed. 2822.From is.
NAK.
[post-SMTP Return-Path]
there is no guarantee it will passed on to the next process.
NAK. The guarantee is in STD 10, STD 11, 2821, 2822, and 3834.
It's only stripped in scenarios behind mail2fido, mail2outlook,
mail2news, or similar gateways, but not by say POP3 or IMAP.
Frank
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