WordPress at a glance
action is not described

woocommerce_update_options_(id)_(email_id) action-hook . WC 1.0

Usage

add_action( 'woocommerce_update_options_(id)_(email_id)', 'action_function_name_8679' );
function action_function_name_8679(){
	// action...
}

Where the hook is called

WC_Settings_Emails::save()
woocommerce_update_options_(id)_(email_id)
woocommerce/includes/admin/settings/class-wc-settings-emails.php 254
do_action( 'woocommerce_update_options_' . $this->id . '_' . $email->id );

Where in WP core the hook is used WooCommerce

woocommerce/includes/emails/class-wc-email.php 254
add_action( 'woocommerce_update_options_email_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/bacs/class-wc-gateway-bacs.php 67
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/bacs/class-wc-gateway-bacs.php 68
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'save_account_details' ) );
woocommerce/includes/gateways/cheque/class-wc-gateway-cheque.php 44
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/cod/class-wc-gateway-cod.php 44
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/paypal/class-wc-gateway-paypal.php 73
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/integrations/maxmind-geolocation/class-wc-integration-maxmind-geolocation.php 50
add_action( 'woocommerce_update_options_integration_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/flat-rate/class-wc-shipping-flat-rate.php 40
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/free-shipping/class-wc-shipping-free-shipping.php 73
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/legacy-flat-rate/class-wc-shipping-legacy-flat-rate.php 40
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/legacy-free-shipping/class-wc-shipping-legacy-free-shipping.php 90
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/legacy-international-delivery/class-wc-shipping-legacy-international-delivery.php 33
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/legacy-local-delivery/class-wc-shipping-legacy-local-delivery.php 74
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/legacy-local-pickup/class-wc-shipping-legacy-local-pickup.php 73
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/shipping/local-pickup/class-wc-shipping-local-pickup.php 56
add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );