Post-Purchase Hub sends emails — a confirmation when a customer raises a request, a notification to you when one arrives, and a message when you approve or decline.

None of them are configured on the plugin’s own settings screen. They are ordinary WooCommerce emails, so they live with all your other WooCommerce emails at WooCommerce → Settings → Emails.

That means recipients, subjects, wording and the on/off switch for each email are changed in one place rather than two, and they inherit the header, footer and colours you have already set for your store.

If an email is not arriving, check it is enabled on the WooCommerce Emails screen first — that switch governs it, not anything in this plugin.