New submission from Milan Oberkirch: Sending HELO or EHLO more then once causes smtpd.SMTPChannel to respond with b'503 Duplicate HELO/EHLO\r\n' (see Lib/test/test_smtpd.py:124 for an example).
My interpretation of RFC 821, section 4.1.1.5 is that multiple HELO commands are fine outside a mail transaction and a second HELO is eauivalent to a RSET during a mail transaction (undoing any changes made by previous greetings). I would propose to reject greetings during mail transactiond (thats what RSET is for) and else accept them. The question is how we should handle backwards compatibility here. I am willing to work on this right after #21725. ---------- components: email messages: 220754 nosy: barry, jesstess, pitrou, r.david.murray, zvyn priority: normal severity: normal status: open title: smtpd.py does not allow multiple helo/ehlo commands versions: Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21783> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
