protected function quit()
    {
        $in = "QUIT" . $this->CRLF;
        $code = $this->pushStack($in);
        if ($code !== '221'){
            throw new CodeException('221', $code, array_pop($this->resultStack));
        }
        return $this;
    }
protected function quit()
    {
        $in = "QUIT" . $this->CRLF;
        $code = $this->pushStack($in);
        if ($code !== '221'){
            throw new CodeException('221', $code, array_pop($this->resultStack));
        }
        return $this;
    }
protected function quit ( ) { $ in = "QUIT" . $ this -> CRLF ; $ code = $ this -> pushStack ( $ in ) ; if ( $ code !== '221' ) { throw new CodeException ( '221' , $ code , array_pop ( $ this -> resultStack ) ) ; } return $ this ; }
SMTP QUIT
SUCCESS 221
@return $this
@throws CodeException
@throws SMTPException
SMTP QUIT SUCCESS 221