Deliver our message

        Arguments:
        - `message`: MIMEMultipart

        Return: None
        Exceptions: None

def deliver(self, message, to):
        """
        Deliver our message

        Arguments:
        - `message`: MIMEMultipart

        Return: None
        Exceptions: None
        """
        # Send the message via local SMTP server.
        s = smtplib.SMTP(self.host, self.port)
        s.ehlo()
        s.starttls()
        s.login(self.user, self.pw)
        # sendmail function takes 3 arguments: sender's address, recipient's address
        # and message to send - here it is sent as one string.
        s.sendmail(message['From'], to, message.as_string())
        s.quit()
        return