经过我的托管服务很长时间来回,我发现,为了避免欺骗,他们不允许在他们不主持的FROM地址发送电子邮件.也就是说,如果该网站的访问者在表单中写下他的gmail / yahoo等,我将无法得到它.

他们建议使用托管在其中的电子邮件地址作为FROM地址,并将访问者的输入电子邮件作为REPLY-TO地址.这看似合理.

所以我挖了一下(例如这里：
PHP reply-to error – comes with admin email not sender of contact form
和
php Contact Form on website and reply-to email)

并且答案提示添加标题组件：

$headers = 'From: webmaster@example.com' . "\r\n" .
    'Reply-To: webmaster@example.com' . "\r\n" .
    'X-Mailer: PHP/' . PHPversion();

并将其添加到

mail($to,$subject,$message,$headers);

这就是我做的.
$email在此模板中定义为访问者的电子邮件,因此我所做的是：

$subject = "Contact Form: $name";
$message = "$message";
$headers = 'From: myemail@my_domain.com' . "\r\n" .
    'Reply-To: $email' . "\r\n" .
    'X-Mailer: PHP/' . PHPversion();

mail($to,$headers);

这一切都很好,花花公子,但它仍然不能很好地工作.
电子邮件现在可以通过,但细节是：

from:    myemail@my_domain.com via servername.hosting_company.com 
**reply-to:  $email@servername.hosting_company.com**
to:  myemail@my_domain.com

所以,回复地址仍然不是访客留下的.

你能帮我解决这个问题吗？不知道我还能做些什么.

非常感谢！

如果有人有兴趣,这里是完整的PHP文件：

<?PHP

// Clean up the input values
foreach($_POST as $key => $value) {
    if(ini_get('magic_quotes_gpc'))
        $_POST[$key] = stripslashes($_POST[$key]);

    $_POST[$key] = htmlspecialchars(strip_tags($_POST[$key]));
}

// Assign the input values to variables for easy reference
$name = $_POST["name"];
$email = $_POST["email"];
$message = $_POST["message"];

// Test input values for errors
$errors = array();
if(strlen($name) < 2) {
    if(!$name) {
        $errors[] = "You must enter a name.";
    } else {
        $errors[] = "Name must be at least 2 characters.";
    }
}
if(!$email) {
    $errors[] = "You must enter an email.";
} else if(!validEmail($email)) {
    $errors[] = "You must enter a valid email.";
}
if(strlen($message) < 10) {
    if(!$message) {
        $errors[] = "You must enter a message.";
    } else {
        $errors[] = "Message must be at least 10 characters.";
    }
}

if($errors) {
    // Output errors and die with a failure message
    $errortext = "";
    foreach($errors as $error) {
        $errortext .= "<li>".$error."</li>";
    }
    die("<span class='failure'><h3>Sorry,The following errors occured:</h3><ol>". $errortext ."</ol><a href='contact.html' class='more'>Refresh Form</a></span>");
}


// --------------------------------------//
// Send the email // INSERT YOUR EMAIL HERE
$to = "myemail@my_domain.com";
// --------------------------------------//


$subject = "Contact Form: $name";
$message = "$message";
$headers = 'From: myemail@my_domain.com' . "\r\n" .
    'Reply-To: $email' . "\r\n" .
    'X-Mailer: PHP/' . PHPversion();


mail($to,$headers);

// Die with a success message
die("<span class='success'><h3>Successfully Sent!</h3> Your message is on its way,we will respond to you shortly.</span>");

// A function that checks to see if
// an email is valid
function validEmail($email)
{
   $isValid = true;
   $atIndex = strrpos($email,"@");
   if (is_bool($atIndex) && !$atIndex)
   {
      $isValid = false;
   }
   else
   {
      $domain = substr($email,$atIndex+1);
      $local = substr($email,$atIndex);
      $localLen = strlen($local);
      $domainLen = strlen($domain);
      if ($localLen < 1 || $localLen > 64)
      {
         // local part length exceeded
         $isValid = false;
      }
      else if ($domainLen < 1 || $domainLen > 255)
      {
         // domain part length exceeded
         $isValid = false;
      }
      else if ($local[0] == '.' || $local[$localLen-1] == '.')
      {
         // local part starts or ends with '.'
         $isValid = false;
      }
      else if (preg_match('/\\.\\./',$local))
      {
         // local part has two consecutive dots
         $isValid = false;
      }
      else if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/',$domain))
      {
         // character not valid in domain part
         $isValid = false;
      }
      else if (preg_match('/\\.\\./',$domain))
      {
         // domain part has two consecutive dots
         $isValid = false;
      }
      else if(!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/',str_replace("\\\\","",$local)))
      {
         // character not valid in local part unless 
         // local part is quoted
         if (!preg_match('/^"(\\\\"|[^"])+"$/',$local)))
         {
            $isValid = false;
         }
      }
      if ($isValid && !(checkdnsrr($domain,"MX") || checkdnsrr($domain,"A")))
      {
         // domain not found in DNS
         $isValid = false;
      }
   }
   return $isValid;
}

?>