On Thu, Nov 18, 2010 at 12:34:21PM -0600, Stan Hoeppner wrote:

> The fact that the Subject: header lines are encoded
> probably has much more to do with the email being composed in a language
> that requires special characters.

No, various english MUAs defensively, and unnecessarily, encode the
Subject line. If the MUA supports UTF-8 and the user's environment is
configured to say en_US.UTF-8, ... the MUA may well apply RFC 2047 to
an ASCII subject.

    $ cat /etc/sysconfig/i18n
    LANG="en_US.UTF-8"
    SUPPORTED="en_US.UTF-8:en_US:en"
    SYSFONT="latarcyrheb-sun16"

> This in itself does not make an email spam.

This filter is too fragile IMHO. My best advice is to find filters that
detect spam.

> But the fact that we don't receive legit mail composed in
> non-English languages does make it spam.

RFC 2047 is not about non-Enlish. It enables encoding of non-ASCII
characters, these may crop up in English text from time to time.
It is naïve to assume otherwise :-)

> Does my motivation here make more sense now?

Not really, the approach is still too fragile IMHO.

-- 
        Viktor.

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