Erik Quaeghebeur <pyt...@equaeghe.nospammail.net> added the comment:
We also shouldn't forget Resent-Message-Id. So in the header registry <https://github.com/python/cpython/blob/2a9f709ba23c8f6aa2bed821aacc4e7baecde383/Lib/email/headerregistry.py#L562>, 'message-id': MessageIDHeader, should be replaced by 'message-id': UniqueSingleMessageIDHeader, 'resent-message-id': SingleMessageIDHeader, 'in-reply-to': UniqueMessageIDHeader, 'references': UniqueMessageIDHeader, with Unique/Single used as for the other Headers. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41553> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com