Disable New User Notification Emails
Suppresses both the admin notification and the default welcome email sent to the registrant whenever a new account is created.
PHPby SnipCraft
php
<?php
// Disable new-user email to the site admin.
add_filter( 'wp_send_new_user_notification_to_admin', '__return_false' );
// Disable new-user email to the registrant.
add_filter( 'wp_send_new_user_notification_to_user', '__return_false' );#email#notifications#registration#users