XF Addon [2.3.X] [Free] UserCheck - Block Disposable Emails 1.0.0

UserCheck blocks users from registering with disposable/temporary email addresses. It uses the UserCheck.com API to validate email addresses in real-time during registration, helping to reduce spam accounts and improve the quality of your member base.

Automatic Detection - Validates against a daily updated database of emails and domains
Two Authentication Modes - Choose between full email or domain-only authentication (for security)
Free Tier Available - 1,000 API validations per month at no cost
Easy Setup - Automatically redirects to settings after installation
Clean Integration - Extends XenForo's existing validation without modifying the core
Secure Design - If the API goes down, registrations continue as normal

How it works​

1. User tries to register with email address
2. Add-on to check email/domain using UserCheck API
3. If it is a disposable email, registration will be blocked with a friendly error message.
4. If the API is not available, registration will proceed normally (error-free design)

• The add-on itself is completely free.
• UserCheck API offers 1,000 free requests/month
• Paid plans available for larger forums

• XenForo 2.3.0+
• PHP7.4 or higher