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Re: Intent to revive "expires" header from draft-ietf-mailext-new-fields-15

2008-07-24 10:29:08

Jeff Macdonald writes:
Unless of course I am mis-understanding section 4.1.4. I'm not sure how a sending MTA knows it is sending email to a relay. I'm assuming all receiving MTAs could be a relay.

Not within the SMTP universe. The best-priority MX will do final delivery, whatever that means — I'd say it means the message crosses the border from where SMTP applies to somewhere else, such as where X.400 applies or where local policy applies.


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