CM Email Blacklist (CMRB) - General Settings (Selecting Lists)
Navigate to Admin Panel → CM E-Mail Registration Blacklist.
Click on the General Settings tab.
In the General Options box, click the circle to mark yes or no for the questions listed.
In this section, you can select which what lists will affect the plugin. You can enable or disable these lists:
- General (Affects all)
- Domain White List - Protects emails from the White List from being blocked.
- Accept domains only from White List - Self-explanatory.
- Domain Black List - Blocks emails from the Black List.
- User Lists (From the plugin)
- Online Lists
DNSBL Information provides a single place where you can check that blacklist status of your mail server's IP address on more than 100 DNS based blacklists.
To start just go to their page, enter the IP address of your mail server above and press the " CHECK THIS IP" button.
This is an additional filter you can add on top of all the existing filters to prevent domains registration to your site. it does not replace the Free Domains list but can come in addition to it based on the general setting you define for your domain registration behavior.
To learn about reCAPTCHA, check the specific guide: General Support - reCAPTCHA - What is It and How to Enable.