Initiate a SMTP session and send an email.

def send_email(self, message):
        """Initiate a SMTP session and send an email."""
        msg = MIMEMultipart()
        msg['From'] = self.from_address
        msg['To'] = self.to_address
        msg['Subject'] = self.title
        msg.attach(MIMEText('<pre>' + cgi.escape(message) + '</pre>', 'html'))
        smtp = smtplib.SMTP(self.server, self.port,
                            timeout=self.timeout)
        if self.tls_auth:
            smtp.starttls()
            smtp.login(self.user, self.password)
        smtp.sendmail(self.from_address, self.to_address, msg.as_string())
        smtp.quit()