Enhancement – Limit by user role

If you are familiar with PHP, locate this in file class.email-post-changes.php:

// The meat of the plugin
function post_updated( $post_id, $post_after, $post_before ) {
	$options = $this->get_options();
	...

Replace with this, maybe change/add your roles:

// The meat of the plugin
function post_updated( $post_id, $post_after, $post_before ) {
	if ( current_user_can( 'administrator' ) || current_user_can( 'editor' ) )
		return;

	$options = $this->get_options();
	...

It would be trivial to add a selection of roles to admin backend and code, similar to the selection of post types, I’ll leave that as an exercise for the reader…