CM Email Registration Blacklist (CMRB) - Adding Free Domains
Adding Free Domains
Navigate to Admin Panel → CM E-Mail Registration Blacklist.
Click on Free Domains tab.
Here you will find the list of free domains that have already been identified as spam by the website SpamAssassin, and added to the blacklist.
You have the option of updating the list by clicking the blue update button in the upper right hand corner of the box. Updating the list will fetch the latest list and update the plugin information on your WordPress database.