[issue35788] smtpd.PureProxy and smtpd.MailmanProxy broken by extra kwargs, bytes and more

[Samuel Colvin]

Change by Samuel Colvin <samcolvin at gmail.com>:


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keywords: +patch, patch
pull_requests: +11381, 11382
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35788>
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