add-reply-to-pmpro-email-headers.php

<?php
/**
 * Add a reply-to address to PMPro email headers.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function add_reply_to_pmpro_email_headers( $headers, $email ) {
	// Set the reply-to address.
	$reply_to_name = 'John Doe'; // set to '' to use blog name
	$reply_to_email = '[email protected]'; // set to '' to use blog email

	// If no name or email is set, use the blog name and email.
	if ( empty( $reply_to_name ) ) {
		$reply_to_name = get_bloginfo( 'name' );
	}

	// If no email is set, use the blog email.
	if ( empty( $reply_to_email ) ) {
		$reply_to_email = get_bloginfo( 'admin_email' );
	}

	// Add the reply-to header.
	$headers[] = 'Reply-To: ' . $reply_to_name . ' <' . $reply_to_email . '>';
	return $headers;
}
add_filter( 'pmpro_email_headers', 'add_reply_to_pmpro_email_headers', 10, 2 );