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Re: [ietf-dkim] Re: ISSUE 1525 -- Restriction to posting by firstAuthor breaks email semantics

2008-01-18 09:28:06
Frank Ellermann wrote:
Arvel Hathcock wrote:

suppose that the Sender header were used only when the domain found therein matched one of those in the From. Then it would disambiguate the process allowing SSP to know precisely which
of the multiple domains involved in authorship purports to be
that which posts the message to the mail stream.
This would not help in cases where the Sender: domain is
entirely different from any found in the From: but at least
it would address the root concern found in issue 1525.  That
is, it could no longer be said  that SSP requires the first
author to be the poster (which is the meat of issue 1525) and
this issue could perhaps be closed?

It's a plausible idea, IMO really better than "first author".

Wannabe "mailing lists" mutilating an existing Sender have no
leg to stand on, multi-author scenarios are rare at best, and
SSP explicitly notes that it's not designed for "non-standard"
mailing lists.

What about the situation where you have multiple From addresses
and no Sender (or a sender that doesn't correspond to any of the
From addresses)? This might not be legal 2822, but spammers don't
care about that.

                Mike


SSP would have to note very clearly that your proposal does NOT
allow for at least two standard use cases:  Sender in entirely
different domain, and almost all Resent-* cases.  That covers
Jim's "working as designed" point about my strictly.you@ case.

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