首先碰到的下面的报错：

[2023-07-17 00:00:31,202] ERROR in app: Exception on /test [GET]
Traceback (most recent call last):File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 2190, in wsgi_appresponse = self.full_dispatch_request()^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 1486, in full_dispatch_requestrv = self.handle_user_exception(e)^^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 1484, in full_dispatch_requestrv = self.dispatch_request()^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 1469, in dispatch_requestreturn self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\app.py", line 46, in send_mailmail.send(msg)File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 491, in sendwith self.connect() as connection:File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 144, in __enter__self.host = self.configure_host()^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 163, in configure_hosthost.starttls()File "D:\software\Python311\Lib\smtplib.py", line 769, in starttlsself.ehlo_or_helo_if_needed()File "D:\software\Python311\Lib\smtplib.py", line 611, in ehlo_or_helo_if_neededif not (200 <= self.ehlo()[0] <= 299):^^^^^^^^^^^File "D:\software\Python311\Lib\smtplib.py", line 451, in ehloself.putcmd(self.ehlo_msg, name or self.local_hostname)File "D:\software\Python311\Lib\smtplib.py", line 378, in putcmdself.send(f'{s}{CRLF}')File "D:\software\Python311\Lib\smtplib.py", line 357, in sends = s.encode(self.command_encoding)^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeEncodeError: 'ascii' codec can't encode characters in position 9-11: ordinal not in range(128)

遇到这个报错，第一时间修改上面错误堆栈中的command_encoding，如下：

    def send(self, s):"""Send `s' to the server."""if self.debuglevel > 0:self._print_debug('send:', repr(s))if self.sock:if isinstance(s, str):# send is used by the 'data' command, where command_encoding# should not be used, but 'data' needs to convert the string to# binary itself anyway, so that's not a problem.s = s.encode(self.command_encoding)sys.audit("smtplib.send", self, s)

如上smtplib.py文件修改self.command_encoding，直接换成’utf8’就行，修改完以后，重启项目，就会报下面的错：

[2023-07-17 00:02:35,060] ERROR in app: Exception on /test [GET]
Traceback (most recent call last):File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 2190, in wsgi_appresponse = self.full_dispatch_request()^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 1486, in full_dispatch_requestrv = self.handle_user_exception(e)^^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 1484, in full_dispatch_requestrv = self.dispatch_request()^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask\app.py", line 1469, in dispatch_requestreturn self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\app.py", line 46, in send_mailmail.send(msg)File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 492, in sendmessage.send(connection)File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 427, in sendconnection.send(self)File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 190, in sendmessage.as_bytes() if PY3 else message.as_string(),^^^^^^^^^^^^^^^^^^File "D:\Desktop\GitHub\personal-information-platform\venv\Lib\site-packages\flask_mail.py", line 385, in as_bytesreturn self._message().as_bytes()^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\software\Python311\Lib\email\message.py", line 208, in as_bytesg.flatten(self, unixfrom=unixfrom)File "D:\software\Python311\Lib\email\generator.py", line 116, in flattenself._write(msg)File "D:\software\Python311\Lib\email\generator.py", line 199, in _writeself._write_headers(msg)File "D:\software\Python311\Lib\email\generator.py", line 422, in _write_headersself._fp.write(self.policy.fold_binary(h, v))^^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "D:\software\Python311\Lib\email\policy.py", line 202, in fold_binaryreturn folded.encode(charset, 'surrogateescape')^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeEncodeError: 'ascii' codec can't encode characters in position 56-58: ordinal not in range(128)

然后进去policy.py文件中修改下面信息

        folded = self._fold(name, value, refold_binary=self.cte_type=='7bit')charset = 'utf8' if self.utf8 else 'ascii'return folded.encode(charset, 'surrogateescape')

如上出问题的policy.py文件中，修改如上charset部分，删去charset = 'utf8' if self.utf8 else 'ascii'部分就行，然后就ok了，各种百度都找不到要的答案真的烦。记录一下。