Can 9y99999.app receive emails?
Yes, 9y99999.app can receive emails.
Should you allow users to sign up to your website using the domain 9y99999.app?
No, 9y99999.app is a throwaway domain and
should be blocked.
How to block the disposable domain
You can use MailCheck's
free API to automatically block throwaway emails.
Read our documentation to get started. No registration required.