tesladethray

Allows users to sign up without needing to enter an email address

Users Without Email

Allows users to sign up without needing to enter an email address

Stevish

Restricts registration to email addresses listed on the options page. Assumes WP Members is installed and active, and WP native registration is turned off. Includes both whitelist (accepted emails) and blacklist (blocked emails). The blacklist will override entries in the whitelist.
If you’d like to present an issue or contribute a fix, the Github repository is located at https://github.com/newtribesmission/Restrict-Registration-for-WPMem

Restrict Registration By Email for WP-Members

Restricts registration to email addresses listed within the options file. Assumes WP native registration is turned off.

Users Without Email vs Restrict Registration By Email for WP-Members