1. HTML

<form action="sendmail.php" method="post">

  <label for="name">성명:</label>

  <input type="text" name="name" id="name" />

  <label for="Email">Email:</label>

  <input type="text" name="email" id="email" />

  <label for="Message">내용:</label><br />

  <textarea name="message" rows="20" cols="20" id="message"></textarea>

  <input type="submit" name="submit" value="Submit" />

</form> 

2. sendmail.php

<?php

       // form에서 넘어 온 정보

       $name = trim(strip_tags($_POST['name']));

       $email = trim(strip_tags($_POST['email']));

       $message = htmlentities($_POST['message']);

       // 기본셋팅부분

       $subject = "안녕하세요?";

       $to = 'your@email.com';

       $body = $message;

       $headers = "From: $email\r\n";

       $headers .= "Content-type: text/html\r\n";

       // email 발송

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

       // 발송후 보여줄 화면

       header('Location: thanks.html');

?>