Want to stop all outgoing emails from your WordPress site?

A member of the WordPress Support Club(Learn WordPress) Facebook group asked how to not send WooCommerce emails if the email address was of a certain format. I looked at a few approaches before deciding on a simple one.

This code allows you to unhook and remove the default WooCommerce emails.

Add this code to your child theme’s functions.php file or via a plugin that allows custom functions to be added, such as the Code snippets plugin. Avoid adding custom code directly to your parent theme’s functions.php file, as this will be wiped entirely when you update the theme.

The skeleton code is very simple. The one function handles all the filter calls. The code checks for a specific email address. The Facebook group member needed to match emails with a specific format – a regular expression test with preg_match() would work for it.

Obviously the code could be changed to check other attributes of the order e.g. if certain items were in the order, or the total was over or under a certain amount.

add_action( 'woocommerce_email', 'ashokkuikel_unhook_woocommerce_emails' );
function ashokkuikel_unhook_woocommerce_emails( $email_class ) {
/**
* Hooks for sending emails during store events
**/
remove_action( 'woocommerce_low_stock_notification', array( $email_class, 'low_stock' ) );
remove_action( 'woocommerce_no_stock_notification', array( $email_class, 'no_stock' ) );
remove_action( 'woocommerce_product_on_backorder_notification', array( $email_class, 'backorder' ) );
// New order emails
remove_action( 'woocommerce_order_status_pending_to_processing_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
remove_action( 'woocommerce_order_status_pending_to_completed_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
remove_action( 'woocommerce_order_status_pending_to_on-hold_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
remove_action( 'woocommerce_order_status_failed_to_processing_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
remove_action( 'woocommerce_order_status_failed_to_completed_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
remove_action( 'woocommerce_order_status_failed_to_on-hold_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
// Processing order emails
remove_action( 'woocommerce_order_status_pending_to_processing_notification', array( $email_class->emails['WC_Email_Customer_Processing_Order'], 'trigger' ) );
remove_action( 'woocommerce_order_status_pending_to_on-hold_notification', array( $email_class->emails['WC_Email_Customer_Processing_Order'], 'trigger' ) );
// Completed order emails
remove_action( 'woocommerce_order_status_completed_notification', array( $email_class->emails['WC_Email_Customer_Completed_Order'], 'trigger' ) );
// Note emails
remove_action( 'woocommerce_new_customer_note_notification', array( $email_class->emails['WC_Email_Customer_Note'], 'trigger' ) );
}