Disable new blog welcome email

Under ‘Super Admin -> Users’, look for this option (it’s a checkbox) –

Registration notification – Send the network admin an email notification every time someone registers a site or user account.

Hi duck_boy,

I believe that just disables the email that goes to the main WP install admin (me in this case), as opposed to the specific site administrator assigned to a particular sub-site. Is that correct?

Yes it does, thought that is what you were after – sorry, mis-read your post.

This works. In functions.php, add this function:

add_filter('wp_mail', 'disable_email_filter');
function disable_email_filter($result = '') {

	$to = '';
	$subject = '';
	$message = '';
	$headers = '';
	$attachments = array ();

	return compact('to', 'subject', 'message', 'headers', 'attachments');

}

If you want to make this a permanent feature without disabling email notifications altogether, here’s how you might do it:

function db_remove_new_site_notification_email( $blog_id, $user_id, $password, $title, $meta ) {
return false;
}
add_filter( 'wpmu_welcome_notification', 'db_remove_new_site_notification_email' );