Gets email MIME message

        :return: Email formatted as HTML ready to be sent

def get_mime_message(self):
        """Gets email MIME message

        :return: Email formatted as HTML ready to be sent
        """
        message = MIMEText(
            "<html>" +
            self.get_email_header() +
            get_email_content(self.content_file) +
            self.get_email_footer() +
            "</html>", "html"
        )
        message["subject"] = self.email_subject
        return message