Disable default WordPress emails on WordPress, themes and plugin updates

The PHP constants below will disable the default WordPress emails on WordPress, themes and plugin updates. They should be added into your wp-config.php file.

// Disable WordPress core update emails
add_filter( 'auto_core_update_send_email', '__return_false' );
// Disable WordPress plugin update emails
add_filter( 'auto_plugin_update_send_email', '__return_false' );
// Disable WordPress theme update emails
add_filter( 'auto_theme_update_send_email', '__return_false' );