[PHP]PHP mailer, instead of echoing a messege, go to a different page

Hey everyone!

I have a PHP mailer setup on my website and I have a question on how I can enhance it a little. The php mailer page can be found here.

It’s just a basic form with the action set to “mailer.php”. The php is made up of

<?php 
if(isset($_POST['action'])) { 
$to = "(email editted out)"; 
$subject = "New Messege"; 
$name_field = $_POST['name']; 
$email_field = $_POST['email'];
$messege = $_POST['messege']; 
  
$body = "From: $name_field
 Email: $email_field
 Messege:
 $messege"; 
  
echo "Your messege has been sent, please press the back button to return home."; 
mail($to, $subject, $body); 
} else { 
echo "Error!"; 
} 
?> 

What I want to do is when someone submits the form sucessfully rather then echoing the messege “Your messege has been setn, please press the back buttom to return home.” I want it to take them to a different .html page.

Can anyone help me with how this should be rewritten to do what I had in mind?

All comments appreciated. Thanks in advance!