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bcoe / secure-smtpd

Fork of Python's standard SMTP server. Adding support for various extensions to the protocol.

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Python 3 - 503 Error: send HELO first

aldur opened this issue · comments

commented

On Python 3 I've got the following error while trying to send any mail: 503 Error: send HELO first.

I managed to investigate the source and it appears to be as follows.

You subclass smtpd.SMTPChannel and override the method smtp_EHLO.
In the CPython implementation of this method the instance variable self.seen_greeting is set and then, in the smtp_RCPT method, there is a check on that same variable (relevant code here).
This check fails and trigger the error.

As far as I can see, there is no need to override the smtp_EHLO method.