<form action="mail.php" method="post">
<p>Name:
<input type="text" name="name" size="20"
maxlength="40" />
</p>
<p>Email :
<input type="text" name="email" size="20"
maxlength="60" />
</p>
</p>
<p><b>Details:</b>
<textarea name="details" rows="3" cols="20"></textarea></p>
<div>
<input type="submit" name="submit" value="Submit" />
</div>
</form>
//mail.php
<?php
$mes = $POST['details'];
$to = 'c.mohan@btinternet.com';
$sub = 'call back';
$headers = "From: ".$POST['email']."\r\n";
$mail = mail($to,$sub,$mes,$headers);
if(!$mail){
echo "Email not sent! Please try later...";
}else{
echo "Mail sent successfully!";
}
?>