使用PHP打开电子邮件后收到警告消息

I am using PHPMailer for sending an email. Emails are getting proper but whenever I am opening email which I was sent using PHP Mailer I am getting a warning message.

Note: If I remove anchor tag from $phpMailerText then I am not getting any warning.If I add anchor tag then I am getting warning.Would you help me in this?

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require 'mail/PHPMailerAutoload.php';
    $to = $email;
    //Create a new PHPMailer instance
    $mail = new PHPMailer;

    //Enable SMTP debugging
    // 0 = off (for production use)
    // 1 = client messages
    // 2 = client and server messages
    $mail->SMTPDebug = 0;

    //Ask for HTML-friendly debug output
    $mail->Debugoutput = 'html';

    // Headers 
$headers = "Content-Type: text/plain; charset=\"utf-8\"
"
              . "X-mailer: smtp.gmail.com" . "
" // this will identify the real sender
              . "Precedence: bulk" . "
" // this will say it is bulk sender
              .  "List-Unsubscribe:abc@gmail.com
" // this will reveal the OPT-OUT address
                . "Reply-To: $to
"
                . "To: $to
"
                . "From: $to
";

    //Set the hostname of the mail server
    $mail->Host = 'smtp.gmail.com';

    //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
    $mail->Port = 587;

    //Set the encryption system to use - ssl (deprecated) or tls
    $mail->SMTPSecure = 'tls';

    //Whether to use SMTP authentication
    $mail->SMTPAuth = true;

    //Username to use for SMTP authentication - use full email address for gmail
    $mail->Username = "abc@gmail.com";

    //Password to use for SMTP authentication
    $mail->Password = "****";

    //Set who the message is to be sent from
    $mail->setFrom('abc@gmail.com', 'code');

    //Set an alternative reply-to address
    $mail->addReplyTo('abc@gmail.com', 'code');

    //Set who the message is to be sent to
    $mail->addAddress($to, 'Customer');

    //Set the subject line
    $mail->Subject = 'code';

    $phpMailerText="<!DOCTYPE HTML><html>
    <head>
    <title>HTML email</title>
    </head>
    <body>

    <a href='http://www.companyname.com/changepassword.php?user_id=" .$User_id1."'>Create your password here</a>
    </body>
    </html>";

    $mail->msgHTML($phpMailerText);

    //Replace the plain text body with one created manually
    $mail->AltBody = ' ';

    //send the message, check for errors
    if (!$mail->send()) { echo "Mailer Error: " . $mail->ErrorInfo;
    } else {  
    }

Try the following code and do the other steps.

  1. Create reverse dns record
  2. Configure SPF records
$to = $email;
//Create a new PHPMailer instance
$mail = new PHPMailer;

//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 0;

//Ask for HTML-friendly debug output
$mail->Debugoutput = 'html';

// Headers 
$headers = "Content-Type: text/plain; charset=\"utf-8\"
"
              . "X-mailer: YOUR_SITE_DOMAIN Server" . "
" // this will identify the real sender
              . "Precedence: bulk" . "
" // this will say it is bulk sender
              .  "List-Unsubscribe:info@YOUR_SITE_DOMAIN
" // this will reveal the OPT-OUT address
                . "Reply-To: $email
"
                . "To: $email
"
                . "From: $email
";

$mail->addCustomHeader( $headers );

//Set the hostname of the mail server
$mail->Host = 'smtp.gmail.com';

//Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
$mail->Port = 587;

//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';

//Whether to use SMTP authentication
$mail->SMTPAuth = true;

//Username to use for SMTP authentication - use full email address for gmail
$mail->Username = "me@companydomain.com";

//Password to use for SMTP authentication
$mail->Password = "****";

// Because html is being used
$mail->isHTML(true);

//Set who the message is to be sent from
$mail->setFrom('me@companydomain.com', 'code');

//Set an alternative reply-to address
$mail->addReplyTo('me@companydomain.com', 'code');

//Set who the message is to be sent to
$mail->addAddress($to, 'Customer');

//Set the subject line
$mail->Subject = 'code';

$phpMailerText="<!DOCTYPE HTML><html>
<head>
<title>HTML email</title>
</head>
<body>

<a href='http://www.companyname.com/changepassword.php?user_id=" .$User_id1."'>Create your password here</a>
</body>
</html>";

$mail->msgHTML($phpMailerText);

//Replace the plain text body with one created manually
$mail->AltBody    = "To view the message, please use an HTML compatible email viewer!"; 

//send the message, check for errors
if (!$mail->send()) { echo "Mailer Error: " . $mail->ErrorInfo;
} else {  
}

Please use following code and tell me what happends.

$mail = new PHPMailer(); // create a new object
$mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'tls'; // secure transfer enabled REQUIRED for Gmail
$mail->Host = "smtp.gmail.com";
$mail->Port = 587;
$mail->IsHTML(true);
$mail->Username = "email@gmail.com";
$mail->Password = "password";
$mail->SetFrom("email@gmail.com");
$mail->Subject = "Test";
$mail->Body = "hello";
$mail->AddAddress("email@gmail.com");

 if(!$mail->Send()) {
    echo "Mailer Error: " . $mail->ErrorInfo;
 } else {
    echo "Message has been sent";
 }