Introduction
By default, WordPress (and BuddyBoss Platform) doesn’t include a built-in way to block particular email addresses or domains at signup. To prevent registrations from disposable services, corporate domains, or specific patterns, you can use a lightweight plugin that handles these restrictions for you.
Use a Third-Party Plugin
You can try to use Restrict Usernames Emails Characters lets you:
- Block exact email addresses (e.g., [email protected])
- Prevent registrations from entire domains (e.g., @spamdomain.com)
- Disallow specific characters or patterns in usernames and emails
Learn more:
- Plugin on WordPress.org: https://wordpress.org/plugins/restrict-usernames-emails-characters/
- WPBeginner guide: https://www.wpbeginner.com/plugins/how-to-restrict-usernames-in-wordpress/
Troubleshooting and FAQs
Q: I’m still seeing blocked emails register—what should I check?
A: Make sure the plugin is active, clear any form- or page-cache, and verify your blacklist entries match exactly what you’re testing (e.g., include @ for domains).
Q: Can this plugin block both usernames and emails?
A: Yes. It handles username patterns, email addresses, domains, and even individual characters—all from one settings page.