Day11 运行代码时邮箱密码（授权码）无法输入

在运行day11作业的代码时，需要输入邮箱名和密码，但是密码处于无法输入的状态？
截图如下：
输入发件人邮箱：xxx@163.com
输入发件人邮箱密码：
输入收件人邮箱：pythoncamp@163.com

Traceback (most recent call last):
  File "c:/Users/陈建辉/Documents/GitHub/selfteaching-python-camp/19100402/cjh20040088/d11/main.py", line 24, in <module>
    yag.send(to=recipients,subject=subject,contents=result)
  File "C:\Python37\lib\site-packages\yagmail\sender.py", line 147, in send
    self.login()
  File "C:\Python37\lib\site-packages\yagmail\sender.py", line 246, in login
    self._login(self.credentials)
  File "C:\Python37\lib\site-packages\yagmail\sender.py", line 204, in _login
    self.smtp.login(self.user, password)
  File "C:\Python37\lib\smtplib.py", line 694, in login
    self.ehlo_or_helo_if_needed()
  File "C:\Python37\lib\smtplib.py", line 603, in ehlo_or_helo_if_needed
    raise SMTPHeloError(code, resp)
smtplib.SMTPHeloError: (500, b'Error: bad syntax')

Start with 19100402/cjh20040088/d11/main.py at line 24 and reproduce the Day11 email-sending run described in the issue. Read the yagmail and smtplib traceback to determine whether the password prompt or SMTP connection causes the failure. Done means the credentials can be entered and the script sends the email without the reported SMTPHeloError.