使用 PHPMailer 寄信
出現以下錯誤
**SMTP Error: The following recipients failed: **

但同一台電腦的另一個寄信程式沒問題，這個寄信程式卻有上述問題（設定是一樣的）

程式碼如下：

include("lib/PHPMailer/class.phpmailer.php");
$mail = new PHPMailer();
$mail->IsSMTP();
$mail->SMTPAuth = false;
$mail->Host = 'SMTP主機';
$mail->Port = SMTP主機的port;
$mail->CharSet = "utf-8";
$mail->Encoding = "base64";
$mail->WordWrap = 50;
$mail->Username="";
$mail->Password="";
$mail->From = "設定寄件者信箱";
$mail->FromName = "設定寄件者姓名";
$mail->Subject = "設定郵件標題";
$mail->IsHTML(true);
$mail->AddAddress($email, $tager_id);
$mail->Body =
				"
					郵件內容
				";
				if($mail->Send()) {
					msg("郵件已寄出，請至信箱確認。");
				} else {
					msg($mail->ErrorInfo);
				}
				$mail->ClearAddresses();
				exit;

請求協助，感激不盡