Hi,
I would like to get attention to issue 4142 [1] which was filed several months
ago. This is about a clear bug in smtplib's SMTP implementation which is
probably present since (at least) Python 1.5.
When re-using an smtplib.SMTP instance for a second connection, smtplib does
not send another HELO/EHLO which is a clear violation of the SMTP specification.
I built a small patch (changes only 2 lines) but I'm unable to write a unit
test for this easily because:
* Python's smtpd does not check if HELO/EHLO was received before MAIL FROM
* Therefore any extension of test_smtplib would need some patches to check
this also.
However, the patch is very small so it is very easy to test this manually.
Just connect to a real world smtp (Exim is best because it is quite strict
when it comes to SMTP verbs).
fs
[1] http://bugs.python.org/issue4142
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