Nitish <nitis...@protonmail.com> added the comment: RFC 5322[1] says that header field's name can't have space in it and the must be immediately followed by the ':' character.
Is it common for SMTP servers to accept messages with ' ' before ':'? [1] https://tools.ietf.org/html/rfc5322#section-2.2 ---------- nosy: +nitishch _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32606> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
