PHPMailer认证失败

一开始;对不起，我的英语水平很差。我已经在努力改进了。

这是我的问题。我想用phpmailer发送一些邮件。但邮件发送者无法验证我的每个邮件账户。有趣的是两天前一切都很顺利。

至少我已经尝试了脚本从自述文件和输入我的电子邮件信息，但它仍然不工作。

我现在不知道该怎么办，希望你能帮助我。

require("class.phpmailer.php");
$mail = new PHPMailer();
$mail->IsSMTP();                                      // set mailer to use SMTP
$mail->Host = "smtp1.MyServer.de";  // specify main and backup server
$mail->SMTPAuth = true;     // turn on SMTP authentication
$mail->Username = "mymail@example.com";  // SMTP username
$mail->Password = "mypass"; // SMTP password
$mail->From = "mymail@example.com";
$mail->FromName = "Mailer";
$mail->AddAddress("mymail2@example.com", "test");

$mail->WordWrap = 50;                                 // set word wrap to 50 characters
$mail->IsHTML(true);                                  // set email format to HTML
$mail->Subject = "Here is the subject";
$mail->Body    = "This is the HTML message body <b>in bold!</b>";
$mail->AltBody = "This is the body in plain text for non-HTML mail clients";
if(!$mail->Send())
{
   echo "Message could not be sent. <p>";
   echo "Mailer Error: " . $mail->ErrorInfo;
   exit;
}
echo "Message has been sent";

$mail->SMTPSecure = "ssl"; 
$mail->Port = 465; 

$mail->SMTPSecure = "tls"; 
$mail->Port = 587;