Try this
Adapt it to whatever you like
<?
$recipient = "$email";
$subject = "$subject";
$headers .= "From: $name <$email>\r\n";
$headers .= "Reply-To:$email\r\n";
$headers .= "X-Sender: <$email>\r\n";
$headers .= "X-Mailer: PHP\r\n"; // mailer change "PHP" to whatever you like, example [url]www.yoursite.com[/url]
$headers .= "Return-Path: <$sendto>\r\n"; // Return path for errors
$headers .= "Content-Type: text/html; charset=iso-8859-1\r\n"; // Mime type
$message = "Name: $name<BR>E-mail: $email<BR>Subject: $Subject<BR>Body: $Body<BR>";
mail("$sendto", "$onderwerp", "$message", "$headers");
?>