PHPMailer类发送邮件的问题

[mxz159951]

$mail = new PHPMailer();
	$mail->CharSet = "UTF-8";
	$mail->Mailer = "smtp";
	$mail->IsSMTP();
	$mail->HOST = "smtp.163.com";
	$mail->SMTPAuth = true;
	$mail->Username = "邮箱1";
	$mail->Password = "密码";
	$mail->Port = 25;
	$mail->From = "邮箱1";
	$mail->FromName = "哈哈哈";
	$mail->AddAddress("邮箱2");
	$mail->AddAttachment("../files/1483695759.xls");
	$mail->IsHTML(false);
	$mail->Subject = "测试测试";
	$mail->Body = "随便发发";
	if($mail->send()){
		echo '发送成功';
	}else{
		echo '失败原因：'.$mail->ErrorInfo;
	}

为什么会返回 SMTP Connect() failed.

[傲雪星枫]

$mail->SMTPSecure = 'ssl'; // 加密方式
这个呢？
端口是：465/994
参考：http://help.163.com/10/0731/11/6CTUBPT300753VB8.html

[键盘钢琴师]

163邮箱打开了STMP没？