Please open a new issue. It has better chances of being fixed quickly.

On Mon, Apr 26, 2021 at 10:02 PM junpengruan <report@bugs.python.org> wrote:

>
> junpengruan <632077280@qq.com> added the comment:
>
> Hi
> I think there is another bug when initial_response_ok=False. When using
> AUTH PLAIN, the server will response like:
> ------------------
> C: AUTH PLAIN
> S: 334 ok. go on
> ------------------
> and it's not base64 encoding, while in the auth() it will decode the
> resp(here is "ok, go on") which will cause a binascii.Error:
>
> Traceback (most recent call last):
>   File "/usr/lib/python3.6/smtplib.py", line 644, in auth
>     challenge = base64.decodebytes(resp)
>   File "/usr/lib/python3.6/base64.py", line 553, in decodebytes
>     return binascii.a2b_base64(s)
> binascii.Error: Incorrect padding
>
> I think this fit the title "a bug in smtplib when
> initial_response_ok=False", should I just comment on this issue or open a
> new issue?
> Thanks!
>
> ----------
> nosy: +junpengruan
>
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> <https://bugs.python.org/issue27820>
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