Block Temporary Email

This plugin will verify every email address submitted by users.
It’ll automatically detect and block disposable, temporary email addresses.
It’ll give a nice warning message when users are signing up, logging in,
or changing email to a temporary email.

The plugin checks the domain name using a service named
IsTempMail.
If a domain name is blocked, it will be stored into a local blacklist.
You can also manage your own local whitelist and blacklist to allow or
disallow certain domains.

The plugin integrates with the WordPress built-in function is_email().
It works seamlessly with other plugins including WooCommerce,
Contact Form 7, Gravity Form, Jetpack/Grunion contact forms, Kadence Blocks Forms as well as
other formbuilders and ecommerce plugins and WordPress’ own registration form.