[issue32330] Email parser creates a message object that can't be flattened

[Mark Sapiro]

Mark Sapiro <m...@msapiro.net> added the comment:

Yes. I think errors=replace is a good solution. In Mailman, we have our own 
mailman.email.message.Message class which is a subclass of 
email.message.Message and what we do to work around this and issue27321 is 
override as_string() with:

    def as_string(self):
        # Work around for https://bugs.python.org/issue27321 and
        # https://bugs.python.org/issue32330.
        try:
            value = email.message.Message.as_string(self)
        except (KeyError, UnicodeEncodeError):
            value = email.message.Message.as_bytes(self).decode(
                'ascii', 'replace')
        return value

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