https://buddydev.com/plugins/wordpress-restrict-email-domains/
Your can limit user registration by email domains forWordPressWordPress MultisiteBuddyPressWooCommercePaid Memberships ProWP MembersUsersWPUltimate MemberAllows you to limit new user registrations byDomain names(e.g example.com)Extensions (e.g. .edu, will only allow emails having .edu domain)Email addresses (e.g [email protected], [email protected])You can configure the rules to allow users in the plugin admin panel(domain/email/extensions)
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