Stefano

This add-on plugin for bbPress will allow anonymous users to subscribe to topics and get email notifications when a new reply is posted. The notification email includes an unsubscribe link.
bbPress notifications will keep to go out to registered users, this plugin only extends the thing to anonymous posters as well!
See the project on <a href="https://github.com/TheCrowned/bbPress---Anonymous-Subscriptions" rel="nofollow ugc">GitHub</a>.
Available in English, Italian, German, Norwegian, Ebrew, Serbian.

bbPress – Anonymous Subscriptions

A simple plugin to allow anonymous bbPress users to subscribe to topics and get email notifications when a new reply is posted.

The Block Emails for WooCommerce plugin allows you to block specific email addresses during the WooCommerce checkout process. It’s simple and easy to use. Just enter the email addresses you want to block and the plugin will prevent those emails from being used during checkout. You can also customize the error message that is displayed when a blocked email is used.

Block Emails for WooCommerce Checkout

A WooCommerce plugin to block specific email addresses during checkout.

bbPress – Anonymous Subscriptions vs Block Emails for WooCommerce Checkout