================== 
Get email
==================

<form name="contactform" method="post" action="send_form_email.php">
 
  <label for="email">Email Address *</label>
 
  <input  type="text" name="email" maxlength="80" size="30">
 
  <input type="submit" value="Submit">   <a href="email_form.php">Email Form</a>
 
</form>

==================
Email script
==================

<?php

    $email_to = "you@yourdomain.com";
 
    $email_subject = "Your email subject line";

  function died($error) {
 
        // your error code can go here
 
        echo "We are very sorry, but there were error(s) found with the form you submitted. ";
 
        echo "These errors appear below.<br /><br />";
 
        echo $error."<br /><br />";
 
        echo "Please go back and fix these errors.<br /><br />";
 
        die();
 
    }

========================================
This parses it, but what do I do with
it to make it work in the URL?
========================================

  {

$email_from = $_POST['email']; // required

$error_message = "";
 
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
 
  if(!preg_match($email_exp,$email_from)) {
 
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
 
  }

$email_message .= "Email: ".clean_string($email_from)."\n";

// create email headers
 
$headers = 'From: '.$email_from."\r\n".
 
'Reply-To: '.$email_from."\r\n" .
 
'X-Mailer: PHP/' . phpversion();
 
@mail($email_to, $email_subject, $email_message, $headers);  

===============================================
Or I could forward it from here?
===============================================

{
    Header("Location: https://www.bananasoup.com/letter/?email=emailname%40emaildomain");
}