grosbouff

This plugin adds a checkbox in the post/page admin (for the admins and editors) to tell members (notification & email) that an important post has been published :
Just check the checbox at the bottom of a page/post when editing it. 
(You won’t be able to post a notification if the post/page is not published; password protected or if a notification has been sent before.) 
(If a notification has been sent before; the checkbox will be disabled. You can eventually re-enable it by deleting the meta key bp_admin_notifications_sent.)
Careful : I don’t have tested this plugin with a large amount of members. I suspect the mail function could not support it. Please tell me if you try !

BuddyPress Admin Notifications

This plugin adds a checkbox in the post/page admin (for the admins and editors) to tell members (notification & email) that an important post has  …

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.

BuddyPress Admin Notifications vs Block Emails for WooCommerce Checkout