How to edit new user Email sent after registration

wp_new_user_notification_email – customise email sent to User
wp_new_user_notification_email_admin – customise email sent to Admin

Usage example on email sent to Admin (you can paste this in your theme’s functions.php)

add_filter( 'wp_new_user_notification_email_admin', 'custom_wp_new_user_notification_email', 10, 3 );

function custom_wp_new_user_notification_email( $wp_new_user_notification_email, $user, $blogname ) {
    $wp_new_user_notification_email['subject'] = sprintf( '[%s] New user %s registered.', $blogname, $user->user_login );
    $wp_new_user_notification_email['message'] = sprintf( "%s ( %s ) has registerd to your blog %s.", $user->user_login, $user->user_email, $blogname );
    return $wp_new_user_notification_email;
}

Hi, thank you for your post! I edited the pluggable.php according your instructions. But how can I change the subject and the body message? I do not find the source of that strings. I checked all most files, where I assumed the source. Sorry, I’m a beginner!
Thank you for your help, Stefan

Hi,
is there anybody who has advice how to change the “message” of the “wp_new_user_notification_email”?
Thank you, br, Stefan