Default for sending email on renewal?

This option determines the default email notification mode for SSL certificate renewals for new virtual servers. You can select if the domain owner is notified always, never, or only if renewal fails. You can also choose if the master administrator will be notified as well.

Note that these settings only control email messages sent by your Virtualmin system. Certificate authorities (CAs) such as Let's Encrypt or ZeroSSL may also send their own renewal or expiry emails based on the contact details and notification settings in your account with them. Those CA emails cannot be configured or disabled from within Virtualmin. To change them, you must update the notification options on your CA provider's website.