title: mailutils not working via subprocess.run in python
body: <p>I am trying to send a mail via python's subprocess.run methode. Unfortunately, it is not working. </p>
  
  <pre><code>import subprocess
  
  message = "Hello World"
  
  process = subprocess.run(["mail", "-s", "Test, "xyz@xyz.com", "&lt;&lt;&lt;", message], 
                       stdout=subprocess.PIPE, 
                       universal_newlines=True)
  
  print (process.stdout)
  </code></pre>
  
  <p>I received the following Error:</p>
  
  <p>mail: Cannot parse address <code>&lt;&lt;&lt;' (while expanding</code>&lt;&lt;&lt;'): Malformed email address</p>
  
  <p>mail: Cannot parse address <code>Hello World' (while expanding</code>Hello World'): Malformed email address</p>
  
  <p>The command is working in the shell though (Linux Mint > 19.0).  </p>