PHP邮件文件不再起作用

Question

我的文件mailer.php无法正常工作-它确实曾经（我有电子邮件来证明它！），并且代码均未更改。 它不会抛出任何错误消息。 mail（）可在网站上的其他地方使用，只是不在此文件中。

帮助！

<?php 

  class Mailer 
{

  function sendWelcome($user, $email, $pass){
  $from = "From: ".EMAIL_FROM_NAME." <".EMAIL_FROM_ADDR.">";
  $subject = "Your Site - Welcome!";
  $body = $user.",\n\n"
         ."Welcome! You've just registered at Your site Site "
         ."with the following information:\n\n"
         ."Username: ".$user."\n"
         ."Password: ".$pass."\n\n"
         ."If you ever lose or forget your password, a new "
         ."password will be generated for you and sent to this "
         ."email address, if you would like to change your "
         ."email address you can do so by going to the "
         ."My Account page after signing in.\n\n"
         ."- Your Site";

  return mail($email,$subject,$body,$from);
   }


   function sendNewPass($user, $email, $pass){
  $from = "From: ".EMAIL_FROM_NAME." <".EMAIL_FROM_ADDR.">";
  $subject = "Your Site - Your new password";
  $body = $user.",\n\n"
         ."We've generated a new password for you at your "
         ."request, you can use this new password with your "
         ."username to log in to The Washbroads Site.\n\n"
         ."Username: ".$user."\n"
         ."New Password: ".$pass."\n\n"
         ."It is recommended that you change your password "
         ."to something that is easier to remember, which "
         ."can be done by going to the My Account page "
         ."after signing in.\n\n"
             ."- Your Site";

         return mail($email,$subject,$body,$from);
     }
   };

  /* Initialize mailer object */
   $mailer = new Mailer;

  ?>