mailer.php
public function reset($key=null) {
		if ($key) {
			$key = ucfirst($key);
			$this->smtp->clear($key);
			if (isset($this->recipients[$key]))
				unset($this->recipients[$key]);
		} else {
			$this->recipients = array();
			$this->initSMTP();
		}
	}
public function reset($key=null) {
		if ($key) {
			$key = ucfirst($key);
			$this->smtp->clear($key);
			if (isset($this->recipients[$key]))
				unset($this->recipients[$key]);
		} else {
			$this->recipients = array();
			$this->initSMTP();
		}
	}
reset recipients if key was given, or restart whole smtp plugin
@param null $key