[issue4184] Remove use of private attributes in smtpd

[Mark Lawrence]

Mark Lawrence <breamoreboy at yahoo.co.uk> added the comment:

Would this patch be acceptable, yes or no?

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nosy: +BreamoreBoy
versions: +Python 2.7, Python 3.1, Python 3.2 -Python 2.6

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<http://bugs.python.org/issue4184>
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