WordPress Set WP Mail Headers

<?php
/*
Plugin Name: Set WP Mail Headers
Plugin URI: http://pastebin.com/edit.php?i=WvWknrmp
Version: 1.0
Description: Put anything you want in the email headers.
Author: Kenth Hagström
Author URI: http://designpalatset.se/
Contributors:
License: GPL2
License URI: http://www.opensource.org/licenses/gpl-license.php
*/

/**
 * Set any WP Mail Parameters you'd like to
 *
 * @uses filter wp_mail
 * @param array $params
 * @return array
 */
function dp_set_wp_mail_params( $params ) {
    $params['headers'] = '';
    $params['headers'] .= "Reply-To: Ditt Namn <[email protected]>\r\n";
    $params['headers'] .= "From: Ditt Namn <[email protected]>\r\n";
    $params['headers'] .= "Organization: Organisationsnamn\r\n";
    $params['headers'] .= "MIME-Version: 1.0\r\n";
    $params['headers'] .= "Content-Type: text/plain; charset=iso-8859-1\r\n";
    $params['headers'] .= "X-Priority: 2\r\n"; // Make it less spammy
    $params['headers'] .= "X-Mailer: PHP ". phpversion() ."\r\n";
    return $params;
}
add_filter( 'wp_mail', 'dp_set_wp_mail_params', 5 );

/**
 * Force Return-Path
 *
 * @param object $phpmailer
 * @return void
 */
function dp_fix_return_path( $phpmailer ) {
    $phpmailer->Sender = $phpmailer->From;
}
add_action( 'phpmailer_init', 'dp_fix_return_path', 10 );