title: How to get message-id of email reply exchangelib
body: <p>I need to get the message id of the email sent with exchangelib. I can't find documentation on how to get it.</p>
  
  <pre><code>item = account.inbox.filter(message_id__in=[message_id]).only( 'subject', 
                                                                  'id',
                                                                  'message_id',
                                                                  'sender',
                                                                  'cc_recipients',
                                                                  'to_recipients',
                                                                  'references')[0]
  item.reply(subject='Re: '+ item.subject,
              to_recipients=[item.sender.email_address],
              body='I agree',)
  </code></pre>
  
  <p>If I get the references <code>item.references</code> I get as a result <code>None</code></p>