1个月前，此代码是工作正常的网站，其主机是由"godaddy"提供的，现在主机是由不同的服务器"namecheap"续订域后，此错误发生在发送邮件。我更新了PHPMailer文件，但没有发生。
遇到未捕获的异常类型：phpmailer异常
邮件：SMTP错误：下列收件人失败：www.example.com："您的IP地址：***...：abc@gmail.com: "Your IP:.***.*.: Your domain gmail.com is not allowed in header From"
文件名：/favicon/文件名
行号：1585
回溯：
文件名：//directory_path/phpmailer/类. phpmailer.php行：1337功能：短信发送
文件：/home/目录/文件名：1215功能：发送后
文件：//目录_路径/视图/contact.php行：34功能：发送
文件：/目录_路径/控制器/Contact.php行：7功能：视图

$name= $_POST["name"];
$email = $_POST["email"];
$msg = $_POST["msg"];
require "phpmailer/PHPMailerAutoload.php";
$mail = new PHPMailer(true);
$mail->isSMTP();
$mail->Host = "mail.domain_name.com";
$mail->port = 465;
$mail->SMTPAuth=true;
$mail->SMTPSecure = 'tls';
$mail->Username = "info@example.com";
$mail->Password = '********';
$file_name = $_FILES["attc"]["name"];
$tmp_name = $_FILES["attc"]["tmp_name"];
$path = $_SERVER['DOCUMENT_ROOT'].'/application/views/upload_images/';
move_uploaded_file($tmp_name, $path.$file_name);
$mail->setFrom($email, $name);
$mail->addAddress('abc@gmail.com','Mail Header');
$mail->addReplyTo($email, $name);
$mail->isHTML(true);
if($file_name != '' && $file_name != null){
$mail->AddAttachment($_SERVER['DOCUMENT_ROOT']."/application/views/upload_images/".$file_name,$file_name);
}
$mail->Subject = "Info From Web";
$mail->Body = '<strong>' .$msg . '</strong><br><br><h3>Regard :  '.$name.'</h3>';
if ($mail->send()) {
    echo "<script>alert('Email Sent Success!')</script>";
}
else{
    echo "<script>alert('".$mail->ErrorInfo."')</script>";
}