From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Wed Sep 19 2007 - 13:24:21 CDT

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On Wed, Sep 19, 2007 at 02:14:12PM -0400, Wietse Venema wrote:

> > On the other hand, most receiving systems accept 8bits, so conversion
> > at the edge is not that frequent. Having an ISP smarthost that does not
> > announce 8bit support is a bit unfortunate though, in that case one
> > really has no choice but to down-convert first and then sign.
>
> They can safely specify "disable_mime_output_conversion=yes". In
> this day and age, all ISPs run MTAs that are 8BIT clean.

What happens when the ISP (in this case using Exim) fails to down-convert
content when sending to 7bit-pedantic systems? Part of the reason MIME
went into Postfix was reports of failures when sending to 7bit-pedantic
sites. Are these presumed to be far less common now that ~5 years ago?

Are we ready to recommend "disable_mime_output_coversion=yes" as
a default?

Is there anyone who feels they will benefit in practice (rather than in
theory) from a feature that allows 7bit mail mislabeled as 8bit to go
through unconverted?

--
        Viktor.

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