Block users using blacklists domain from registering to your WordPress site.
This plugin will check if a user trying to register to your WordPress site is using an email from a domain which is defined in blacklists.

**Use-Cases**
* Beta – Control users in your beta release.
* Members Only – Restrict site registration from specific domains
* Control – Control sites users domains
* Spam – Prevent spam users from registration

**Features**
* Allow registration only by invitation code
* Use a list of free email domains downloaded from SpamAssassin
* Use [DNSBL online service](http://www.spamhaus.org/zen/)
* Use user defined own domain blacklist and whitelist
* Admin can edit domain list
* Admin can define which combination of the above methods to use