Questions about using phpmailer to send emails

Concerning the problem of sending emails with phpmailer, the younger brother tried to use phpmailer & nbsp; to send emails shortly after he got in touch with php, but got the following error & nbsp; message .. & nbsp; The & nbsp; following & nbsp; From & nbsp; address & nbsp; failed: & n questions about sending emails with phpmailer
The younger brother just got in touch with php and tried to use phpmailer to send an email, but got The following error message .. The following From address failed: example@163.com

The following is the code. I have not learned php for a long time, so the level is not high. I hope you can help me a lot. thank you!
Require ("class. phpmailer. php ");
$ Mail = new PHPMailer ();
$ Mail-> IsSMTP (); // telling the class to use SMTP
$ Mail-> Host = "smtp.163.com"; // SMTP server
$ Mail-> SetLanguage ("en", "./phpmailer/language /");
$ Mail-> From = "example@163.com ";
$ Mail-> AddAddress ("123123123@hotmail.com ");

$ Mail-> Subject = "First PHPMailer Message ";
$ Mail-> Body = "Hi! \ N This is my first e-mail sent through PHPMailer .";
$ Mail-> WordWrap = 50;

If (! $ Mail-> Send ())
{
Echo 'message was not sent .';
Echo 'mailer error: '. $ mail-> ErrorInfo;
}
Else
{
Echo 'Message has been sent .';
}
?>

------ Solution --------------------
Error message.. The following From address failed: example@163.com

I don't have this EMAIL address.