Send email on renewal?

This setting controls whether Virtualmin sends the virtual server owner an email after an automatic certificate renewal attempt.

Yes sends an email after every successful or failed renewal.
Only on failure sends an email only when renewal fails.
No disables renewal emails from Virtualmin.

When the Notify master administrator as well option is available and selected, the configured master administrator address receives the same notification.

These settings control only messages sent by Virtualmin. The certificate authority may send separate renewal or expiry messages according to the notification settings for your account with that provider.