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information on how to use that character set in an email in an
RFC-compliant way.
Certain character sets must be encoded with quoted-printable or base64
when used in email headers or bodies. Certain character sets must be
converted outright, and are not allowed in email. Instances of this
module expose the following information about a character set:
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base64 encoding), or charset.SHORTEST for the shortest of
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body_encoding: Same as header_encoding, but describes the encoding for the
mail message's body, which indeed may be different than the
header encoding. charset.SHORTEST is not allowed for
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charset output will be converted to. Otherwise, it will
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