ietf-smtp
[Top] [All Lists]

Re: [ietf-smtp] envelope-to format (was: Re: Fwd: New Version Notification for draft-crocker-email-deliveredto-05.txt)

2021-08-09 16:29:38
If we're speaking of a Delivered-To: header, then no I did not.
Exim does not currently have a specific facility for generating one.

Perhaps you were thinking of my description of Envelope-to:

Right, the header described in draft-crocker-email-deliveredto-05 is in fact Envelope-To, not Delivered-To.

As far as I can tell, based on Viktor, Sam, Jeremy, and me descring the operation of software we know in detail, Delivered-To never records an envelope address. When the string looks like a mailbox, that's a coincidence of implementation where the internal form happens to resemble the inbound envelope and the MTA's address translations were not too complicated.

Dave has pointed out that Gmail also adds a Delivered-To address, but I have looked and found no description of it at all, just some speculation in ServerFault. I would guess that Google is familiar with existing Delivered-To and implemnted it the same way, as a loop breaker. But that's just a guess. Does anyone have any documentation or personal knowledge of what Gmail's header does?

Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Primary Perpetrator of "The Internet for 
Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

_______________________________________________
ietf-smtp mailing list
ietf-smtp(_at_)ietf(_dot_)org
https://www.ietf.org/mailman/listinfo/ietf-smtp

<Prev in Thread] Current Thread [Next in Thread>