title: django2.1 send email fail:ssl.SSLError: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:833)
body: <p>I want to send email to myself, so I tried it.
  I had set my email info in settings.py</p>
  
  <pre><code>EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
  EMAIL_USE_TLS = False 
  EMAIL_USE_SSL = True   
  EMAIL_HOST = 'smtp.163.com'  
  EMAIL_PORT = 25     
  EMAIL_HOST_USER = '*****@163.com'    
  EMAIL_HOST_PASSWORD = '***'   
  </code></pre>
  
  <p>then I write down the example from django document</p>
  
  <pre><code>from django.core.mail import send_mail
  
  send_mail(
      'Subject here',
      'Here is the message.',
      'from@example.com',
      ['to@example.com'],
      fail_silently=False,
  )
  </code></pre>
  
  <p>then a exception happened</p>
  
  <pre><code>ssl.SSLError: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:833)
  </code></pre>
  
  <p>How to fix it?</p>