Author r.david.murray
Recipients Cyril Nicodème, barry, r.david.murray
Date 2018-07-19.15:18:03
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Message-id <1532013483.91.0.56676864532.issue34155@psf.upfronthosting.co.za>
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That does appear to be a bug.  Note that the new email API handles it correctly:

    >>> x = """
    ... > From: =?utf-8?Q?zq@redacted.com.cn=E3=82=86=E2=86=91=E3=82=86?=
    ...  =?utf-8?Q?=E3=82=83=E3=82=85=E3=81=87=E3=81=BA=E3=81=BD=E3=81=BC"\=E3?=
    ...  =?utf-8?Q?=81=A9=E3=81=A5=E3=81=A2l=E3=81=A0=E3=81=B0=E3=81=A8=E3=81?=
    ...  =?utf-8?Q?=8FKL=E3=81=84=E3=82=8C=E3=82=8B=E3=82=86>KL=E3=82=89JF?=
    ...  <mxvu@redacted2.com>
    ... """
    >>> from email import message_from_string
    >>> from email.policy import default
    >>> m = message_from_string(x+'\n\ntest', policy=default)
    >>> m['from']
    '"zq@redacted.com.cnゆ↑ゆ ゃゅぇぺぽぼ\\"\\\\� ��づぢlだばと� �KLいれるゆ>KLらJF" <mxvu@redacted2.com>'
    >>> m['from'].addresses[0].addr_spec
    'mxvu@redacted2.com'
    >>> m['from'].addresses[0].display_name
    'zq@redacted.com.cnゆ↑ゆ ゃゅぇぺぽぼ"\\\udce3 \udc81\udca9づぢlだばと\udce3\udc81 \udc8fKLいれるゆ>KLらJF'

I'm not particularly interested myself in fixing parseaddr to handle this case correctly, since it is the legacy API, but if someone else wants to I'll review the patch.
History
Date User Action Args
2018-07-19 15:18:03r.david.murraysetrecipients: + r.david.murray, barry, Cyril Nicodème
2018-07-19 15:18:03r.david.murraysetmessageid: <1532013483.91.0.56676864532.issue34155@psf.upfronthosting.co.za>
2018-07-19 15:18:03r.david.murraylinkissue34155 messages
2018-07-19 15:18:03r.david.murraycreate