Email warning notification toggle

We need Email warning notification toggle within the interface.
We also need the ability for cache to be auto-purged if reaches a certain size without the need of 3rd party plugin.
https://wordpress.org/support/topic/autoptimze-cache-size-warning-turn-off-email-reminders/

The page I need help with: [log in to see the link]