You can configure the following settings in /path/to/softaculous/enduser/universal.php on your server :
$globals['email_update'] = 0;
$globals['email_update_softs'] = 0;
$globals['off_email_link'] = 1;
This will stop the emails sent to admin and endusers. You can then configure this file across your servers.
Please no the "is_vps" setting in universal.php file, its value determines if your server is a VPS or dedicated server. So copy the settings file from your VPS across other VPS and from a Dedicated server across other Dedicated servers.
Please let us know if you need any further information.