mailer.php
public function set($key, $val) {
		$this->smtp->set($key, $this->encode($val));
	}
public function set($key, $val) {
		$this->smtp->set($key, $this->encode($val));
	}
public function set ( $ key , $ val ) { $ this -> smtp -> set ( $ key , $ this -> encode ( $ val ) ) ; }
set encoded header value
@param $key
@param $val
set encoded header value