Add Reply-to configuration to Email Template in WP Job Manager Emails (only required for version 2.1.0 or older)

class-emails.php

<?php
// edit the file located at wp-content/plugins/wp-job-manager-emails/includes/class-emails.php
// on line #107 you will see the the code that replaces the content shortcodes:
$this->content = $shortcodes->replace( $this->template->post_content );

// Right below that, add this line of code:
$this->reply_to = $shortcodes->replace( $this->template->reply_to );

cpt.php

<?php
// edit the file located at wp-content/plugins/wp-job-manager-emails/includes/class-cpt.php
// on line #279 you will see the the $post_metas array that should look like this:
$post_metas = array( 'from_name', 'from_email', 'post_title', 'subject', 'to', 'bcc', 'hook', 'attachments', 'email_format', 'exclude' );

// Change that entire line to look like this:
$post_metas = array( 'from_name', 'from_email', 'post_title', 'subject', 'to', 'bcc', 'hook', 'attachments', 'email_format', 'exclude', 'reply_to' );

// As you will notice, the only change is adding 'reply-to' in the array  --- this tells the email template to save the reply-to value when saving an email template

headers.php

<?php

// edit the file located at wp-content/plugins/wp-job-manager-emails/includes/admin/views/headers.php
// on line #45 you will see the closing HTML </div> for the "from_email" input field
// Add this code right below that closing </div> to add configuration in advanced area for reply-to
?>

<div class="field ui left icon input tooltip">
	<input type="text" name="reply_to" id="reply_to" value="<?php $this->the_reply_to(); ?>" placeholder="" data-content="<?php _e( 'Set a custom Reply-To address in the email (shortcodes supported)' ); ?>" data-variation="small" data-title="<?php _e( 'Reply-To (optional)' ); ?>">
	<i class="reply icon"></i>
</div>