Algo de codigo a la rapida, espero que te sirva al menos la logica
$ins = mysql_query("INSERT INTO Base de datos SET Email='$email', Nombre='$nombre'");
if ($ins){ // Si ingreso en la base de datos manda mail.
$Name = "Da Duder"; //senders name
$email = "
[email protected]"; //senders e-mail adress
$recipient = "
[email protected]"; //recipient
$mail_body = "The text for the mail..."; //mail body
$subject = "Subject for reviever"; //subject
$header = "From: ". $Name . " <" . $email . ">\r\n"; //optional headerfields
mail($recipient, $subject, $mail_body, $header); //mail command
}else{
echo "no se ha podido ingresar a la base de datos";
}
Saludos