title: Python send email with "quoted-printable" transfer-encoding and "utf-8" content-encoding
body: <p>python's <code>email.mime</code> tends to use encoding <code>base64</code> or <code>7bit</code> and <code>us-ascii</code>.  I would like to use <code>quoted-printable</code> and <code>utf-8</code> as this is easier for humans to read and debug.</p>
  <p>Currently, my emails look like</p>
  <pre><code>--===============6135350048414329636==
  MIME-Version: 1.0
  Content-Type: text/plain
  Content-Transfer-Encoding: base64
  
  IyEvYmluL2Jhc2gKCmZvciBpIGluIHs4Mjg4Li44N
  </code></pre>
  <p>or</p>
  <pre><code>--===============0756888342500148236==
  MIME-Version: 1.0
  Content-Transfer-Encoding: 7bit
  
  happy face =E2=98=BA
  </code></pre>
  <p>I would like the raw email to be in quoted-printable unicode so it is easier for humans to read.</p>
  <pre><code>--===============5610730199728027971==
  MIME-Version: 1.0
  Content-Transfer-Encoding: quoted-printable
  Content-Type: text/plain; charset=&quot;utf-8&quot;
  
  happy face ☺
  </code></pre>