可能的重复项：
来自 PHP 在 Windows Azure 中的电子邮件

我是PHP的新手，但我开始看到它对非常简单的事情的价值，我希望你能阐明为什么下面的代码不起作用。换句话说，我从未收到过电子邮件。第一个代码块是我拥有服务器端的PHP代码，第二个代码块是将其提交给该PHP代码的形式。

我目前在 Azure 云中托管此网站，因此它运行在Microsoft的服务器上，并且我已经验证了 PHP v5.3 正在运行。

PHP代码

<?php
  if(isset($_POST['email'])) {
    // EDIT THE 2 LINES BELOW AS REQUIRED
    $email_to = "some_email_address";
    $email_subject = "Contact Form Submitted";
    function died($error) {
      echo "We are very sorry, but there were error(s) found with the form you submitted. ";
      echo "These errors appear below.<br /><br />";
      echo $error."<br /><br />";
      echo "Please <a href='javascript:history.go(-1)'>go back</a> and fix these errors.<br /><br />";
      die();
    }
    // validation expected data exists
    if(!isset($_POST['first_name']) ||
      !isset($_POST['last_name']) ||
      !isset($_POST['email']) ||
      !isset($_POST['telephone']) ||
      !isset($_POST['comments'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');
      }
      $first_name = $_POST['first_name']; // required
      $last_name = $_POST['last_name']; // required
      $email_from = $_POST['email']; // required
      $telephone = $_POST['telephone']; // not required
      $comments = $_POST['comments']; // required
      $error_message = "";
      $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+'.[A-Za-z]{2,4}$/';
      if(!preg_match($email_exp,$email_from)) {
        $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
      }
      $string_exp = "/^[A-Za-z .'-]+$/";
      if(!preg_match($string_exp,$first_name)) {
        $error_message .= 'The First Name you entered does not appear to be valid.<br />';
      }
      if(!preg_match($string_exp,$last_name)) {
        $error_message .= 'The Last Name you entered does not appear to be valid.<br />';
      }
      if(strlen($comments) < 2) {
        $error_message .= 'The Comments you entered do not appear to be valid.<br />';
      }
      if(strlen($error_message) > 0) {
        died($error_message);
      }
      $email_message = "Form details below.'n'n";
      function clean_string($string) {
        $bad = array("content-type","bcc:","to:","cc:","href");
        return str_replace($bad,"",$string);
      }
      $email_message .= "First Name: ".clean_string($first_name)."'n";
      $email_message .= "Last Name: ".clean_string($last_name)."'n";
      $email_message .= "Email: ".clean_string($email_from)."'n";
      $email_message .= "Telephone: ".clean_string($telephone)."'n";
      $email_message .= "Comments: ".clean_string($comments)."'n";
      ini_set("sendmail_from", $email_from);
      // create email headers
      $headers = 'From: '.$email_from."'r'n".
       'Reply-To: '.$email_from."'r'n" .
       'X-Mailer: PHP/' . phpversion();
      @mail($email_to, $email_subject, $email_message, $headers);
   }
?>

表单提交到 PHP

<form name="contactform" method="post" action="send_form_email.php">
  <table width="450px">
    <tr>
      <td valign="top">
        <label for="first_name">First Name *</label>
      </td>
      <td valign="top">
        <input  type="text" name="first_name" maxlength="50" size="30">
      </td>
    </tr>
    <tr>
      <td valign="top">
        <label for="last_name">Last Name *</label>
      </td>
      <td valign="top">
        <input  type="text" name="last_name" maxlength="50" size="30">
      </td>
    </tr>
    <tr>
      <td valign="top">
        <label for="email">Email Address *</label>
      </td>
      <td valign="top">
        <input  type="text" name="email" maxlength="80" size="30">
      </td>
    </tr>
    <tr>
      <td valign="top">
        <label for="telephone">Telephone Number</label>
      </td>
      <td valign="top">
        <input  type="text" name="telephone" maxlength="30" size="30">
      </td>
    </tr>
    <tr>
      <td valign="top">
        <label for="comments">Comments *</label>
      </td>
      <td valign="top">
        <textarea  name="comments" maxlength="1000" cols="25" rows="6"></textarea>
      </td>
    </tr>
    <tr>
      <td colspan="2" style="text-align:center">
        <input type="submit" value="Submit" style="float: left;">
      </td>
    </tr>
  </table>
</form>