Phpmailer sends HTML email hyperlink click invalid solution

Phpmailer sends HTML mail hyperlink click invalid use phpmailer to send HTML mail, & lt ;? Phpinclude_once (& quot; class. phpmailer. php & quot;); $ formmail = & quot; 381266902 phpmailer HTML email hyperlink click is invalid
Use phpmailer to send HTML emails ,,

Include_once ("class. phpmailer. php ");;
$ Formmail = "381266902@qq.com ";
$ Subject = "experiment ";
$ Smtp = "smtp.126.com ";
$ Username = "XXXXXXXX@126.com ";
$ Password = "**********";


$ Mail = new PHPMailer ();
$ Mail-> SMTPAuth = true;
$ Mail-> Host = $ smtp;
$ Mail-> IsSMTP ();
$ Mail-> SMTPAuth = true;
$ Mail-> Username = $ username;
$ Mail-> Password = $ password;
$ Mail-> From = "sou_ba@126.com ";
$ Mail-> FromName = "Souba activation ";
$ Mail-> Sender = "sou_ba@126.com ";
$ Mail-> Subject = $ subject;
$ Mail-> IsHTML (true );
$ Mail-> Body = "google ";

$ Mail-> AddAddress ($ formmail );
If (! $ Mail-> Send ())
{
Echo "failed to send ";
}
Else
{
Echo "sent successfully ";
}
?>


Successfully sent ,,

However, when you enter the email address to open the email, clicking the hyperlink is invalid ,,,


Could you help me solve this problem? thank you.

------ Solution --------------------
Add HTTP: // to the address ://