code: public function initSMTP() {
  		/** @var \Base $f3 */
  		$f3 = \Base::instance();
  		$this->smtp = new \SMTP(
  			$f3->get('mailer.smtp.host'),
  			$f3->get('mailer.smtp.port'),
  			$f3->get('mailer.smtp.scheme'),
  			$f3->get('mailer.smtp.user'),
  			$f3->get('mailer.smtp.pw'));
  		if (!$f3->devoid('mailer.errors_to',$errors_to))
  			$this->setErrors($errors_to);
  		if (!$f3->devoid('mailer.reply_to',$reply_to))
  			$this->setReply($reply_to);
  		if (!$f3->devoid('mailer.from_mail',$from_mail)) {
  			if ($f3->devoid('mailer.from_name',$from_name))
  				$from_name = NULL;
  			$this->setFrom($from_mail, $from_name);
  		}
  	}
docs: initialize SMTP plugin