php - PHPMailer doesn't send Mails with IsHTML(true) or any HTML Code -

i'm trying phpmailer send e-mail verification link. done need use html tag set ishtml true somehow mails won't go out anymore.

here's current code.

    //send welcome e-mail $mail = new phpmailer();  $mail->issmtp();                                      // set mailer use smtp $mail->host = "smtp.yaay.de";  // specify main , backup server $mail->port = "465"; $mail->smtpauth = true;     // turn on smtp authentication $mail->smtpsecure = 'ssl'; $mail->username = "admin@whatever.net";  // smtp username $mail->password = "pass"; // smtp password  $mail->from = "admin@whatever.net"; $mail->fromname = "whatever"; $mail->addaddress($receiver, $receivername);                  // name optional  $mail->subject = "welcome, $receivername!"; $mail->body    = "to activate account, please visit following link: <a href = '?test'>test</a>"; $mail->ishtml(true);  $mail->send();  if(!$mail->send()) {     die($mail->errorinfo); } 

no errror displayed, have no idea how find out problem is. :( know html code or ishtml(true) enough kill e-mail sending process. :/