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filter is not described

send_network_admin_email_change_email filter-hook . WP 4.9.0

Filters whether to send the network admin email change notification email.

Usage

add_filter( 'send_network_admin_email_change_email', 'filter_function_name_9618', 10, 4 );
function filter_function_name_9618( $send, $old_email, $new_email, $network_id ){
	// filter...

	return $send;
}
$send(true/false)
Whether to send the email notification.
$old_email(string)
The old network admin email address.
$new_email(string)
The new network admin email address.
$network_id(int)
ID of the network.

Where the hook is called

wp_network_admin_email_change_notification()
wp-includes/ms-functions.php 2682
$send = apply_filters( 'send_network_admin_email_change_email', $send, $old_email, $new_email, $network_id );

Where the hook is used (in WP core)

Does not used.