From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Thu Sep 20 2007 - 22:15:45 CDT

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On Thu, Sep 20, 2007 at 06:41:29AM -0700, j debert wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Wietse Venema wrote:
>
> [snip]
>
> >
> > Postfix must not degenerate into an unmaintainable mess of workarounds.
> > It's better to omit a workaround than to gradually erode integrity.
> >
> >
>
> Is there a header that could be added to indicate whether the source
> mta sent the message as 8-bit, etc.? Perhaps something like, say,
> "X-Origin-Content-Transfer-Encoding:"? Or is there a chance that some
> downstream mta will remove or mangle it?
>

No, this information is carried via the ESMTP "8BITMIME" extension in the
MAIL FROM command:i "MAIL FROM:<sender> BODY=8BITMIME". In the absense of
"BODY=" directives, Postfix determines the encoding domain of the message
from its MIME entity headers, and then propagates that via ESMTP.

--
        Viktor.

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