rmail not working

// ** Send HTML email ****

$msg="<b>Hello there</b>
Best regards";
$subject="Sample subject";
$attachments = array();

$message="Hello there\nBest regards";
$subject="Sample subject";

$globalSettings["useBuiltInMailer"] = false;
$globalSettings["useCustomSMTPSettings"] = true;
$globalSettings["strSMTPUser"] = "email";

$globalSettings["strSMTPServer"] = "hostname";

$globalSettings["strSMTPPort"] = "465";

$globalSettings["strSMTPPassword"] = "password";

$globalSettings["strFromEmail"] = "email";

$globalSettings["SMTPSecure"] = "ssl";

$ret=runner_mail(array('to' => $email, 'subject' => $subject, 'body' => $message));

//$ret=runner_mail(array('to' => $email, 'subject' => $subject, 'htmlbody' => $msg, 'from'=>$from, 'attachments' => $attachments));
// Put your code here.
if(!$ret["mailed"])
echo $ret["message"];