Limit user email domains in BuddyPress

Friday, March 4th, 2011

One of my upcoming projects is an intranet. For many reasons, I have chosen to use BuddyPress as the starting point and customize it for specific needs.

One such need is a restriction on which email address domains can be used to register a user. For instance, if I were to create such a system for, I would want only users with a email address to register. Anyone else would simply not be allowed.

After some digging around, it seemed like there was no plugin that would quickly do what I was looking for. There were options, but most felt complicated or hacks. That is, until I found the following line in bp-core-signup.php:

// in function bp_core_validate_user_signup
$limited_email_domains =
    get_site_option( 'limited_email_domains', 'buddypress' );

Great! All that is left is a quick plugin to populate ‘limited_email_domains’.

Plugin Name: Restricted Email Domains
Description: Restricts registration user email addresses to
add_option('limited_email_domains', array(''));

Activate the plugin and you’re good to go.

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