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

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In message <[email protected]>, Viktor Dukhovni
<[email protected]> writes

>Are we trying to make "Delivered-To" loop detection more uniform across
>M[TD]As?  Are we trying to support multidrop mailboxes?  Something else?

sadly no-one seems to be picking up on promoting the use of opaque
strings for the detection of loops which is (a) privacy preserving
(which cannot be dismissed out of hand) (b) more robust (since machines
often think they have the same name, when they should not (@local)) and
(c) is to a large extent what is happening already in that discussion
often says that only the particular MTA can possibly understand what the
"human readable" strings actually mean, viz they are already opaque ...

myself, when I look for loops I am staring at my own logs and perhaps
on-the-wire totals rather than trying to pin down a sample email and
examine all the headers --- the last of these is particularly hard when
you are running a mail system for "other people" and you have to get a
lawyer to hold your hand before you can inspect actual traffic ... viz I
don't generally care what other MTAs put into headers, I care what they
send me (or refuse to accept)

>If there's nothing beyond what's in the draft, then it is about time to
>make it clear that it is no experiment, and is just trying to document
>current practice.

which, if it is entirely practice that occurs within a single MTA is not
something that is usefully standardised across MTAs -- unless one is
trying to promote some Best Practice in which case settling on practices
which are more acceptable in this century is, I suggest, desirable

- -- 
richard                                                   Richard Clayton

Those who would give up essential Liberty, to purchase a little temporary 
Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755

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