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Date: Thu, 1 Aug 2013 08:20:34 -0700 (PDT)
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Subject: Re: email 8bit encoding
From: rurpy@yahoo.com
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On 07/29/2013 02:52 PM, Antoon Pardon wrote:
> Op 29-07-13 01:41, rurpy@yahoo.com schreef:
>> How, using Python-3.3's email module, do I "flatten" (I think
>> that's the right term) a Message object to get utf-8 encoded
>> body with the headers:
>>   Content-Type: text/plain; charset=UTF-8
>>   Content-Transfer-Encoding: 8bit
>> when the message payload was set to a python (unicode) string?
>>
> 
> I am just trying out some things for my self on python 3.2 so
> be sure to test this out but you could try the following.
> 
> msg.set_charset('utf-8')
> msg['Content-Transfer-Encoding'] = '8bit'

You can do that but the problem occurs when you call 
email.generator.flatten (or it is called on your behalf by 
somthing like smtplib.send_message) with such a message.  
flatten always assumes a 7bit encoding and uses the ascii 
codec to encode the message resulting in a UnicodeEncode 
exception when it hits an 8 bit character.  So gymnastics 
like W. Trevor King implemented are necessary.