Hi,

Thanks for your reply. Unfortunately it doesn't work. I don't know why.
I did read the doc many times, without the expected result.

See <https://docs.python.org/2/library/email.message.html#email.message.Message.set_payload> and the implicit <https://docs.python.org/2/library/email.message.html#email.message.Message.set_charset>.

My code is inside this custom handler. It works, but not for keeping the encoding.
https://github.com/Sylvain303/mailman-AttachmentMove/blob/master/AttachmentMove.py#L338

It could be related to this specific usage inside the recursive change…

To solve it, I've forced the encoding explicitly:

            msg.set_payload(new_content)
            del msg['content-transfer-encoding']
            encoders.encode_7or8bit(msg)

I hope it will handle it correctly.


This code outside mailman is working: took from http://bugs.python.org/issue1525919

from email.Message import Message
from email.Charset import Charset, QP
text = "="
msg = Message()
charset = Charset("utf-8")
charset.header_encoding = QP
charset.body_encoding = QP
msg.set_charset(charset)
msg.set_payload(text)
print msg.as_string()



I've tried with no success:

from email.Charset import Charset, QP, BASE64
[…]
            del msg['content-transfer-encoding']
            charset = Charset("utf-8")
            charset.header_encoding = BASE64
            charset.body_encoding = BASE64
            msg.set_charset(charset)
            msg.set_payload(new_content)

I got the output below. But it's not base64… just the plain new_content I've produced. I don't need the base64 encoding specially, just that the content match what the header is saying.


   MIME-Version: 1.0
   Content-Type: text/html; charset="utf-8"
   Content-Transfer-Encoding: base64

   <html>
      <head>[…]


If I call the encoding explicitly it works, in conjunction with msg.set_charset(charset), I got header Content-Transfer-Encoding: twice.

            msg.set_payload(new_content)
            encoders.encode_base64(msg)

Regards,
Sylvain.
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