title: Does using TLS make any sense when sending mail to localhost?
body: <p>I made a script in Python3 which sends emails to localhost, but I could not use TLS because it gave me the next error:</p>
  
  <pre><code>STARTTLS extension not supported by server.
  </code></pre>
  
  <p>I was trying to solve that, but then I thought about the question:</p>
  
  <p>Does using TLS make any sense when sending mail to localhost?</p>
  
  <p>I mean, you send your email in plain text to your localhost mail server, and this is the one in charge of encrypting the mail and send it via TLS, isn't it?</p>