Hans-Peter Jansen added the comment: Sorry guys for not providing this earlier.
It turned out, that the sub optimal behaviour is related to a unfortunate policy choice: email.policy.SMTP. ---------- Added file: http://bugs.python.org/file43416/email_flatten.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27257> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com