<?php
 $email = $_POST['email'];

if (empty($email)) {
header('Location: /');
exit(0);
}

 require_once "Mail.php";

 $from = "<no-reply@sr76.ru>";
 $to = "<karina@sr76.ru>";
 $subject = "Подписка";
 $body = "Заинетерсовался новый email - $email";

 $host = "mail.sr76.ru";
 $username = "no-reply@sr76.ru";
 $password = "PASSWORD";

 $headers = array ('From' => $from,
   'To' => $to,
   'Subject' => $subject);
   $smtp = Mail::factory('smtp',
   array ('host' => $host,
     'auth' => true,
     'username' => $username,
     'password' => $password));

 $mail = $smtp->send($to, $headers, $body);

 if (PEAR::isError($mail)) {
   echo("<p>" . $mail->getMessage() . "</p>");
  } else {
   echo("<p>Message successfully sent!</p>");
   header('Location: /');
  }
 ?>