Can k5a781cq.luksarcenter.ru receive emails?
Yes, k5a781cq.luksarcenter.ru can receive emails.
Should you allow users to sign up to your website using the domain k5a781cq.luksarcenter.ru?
No, k5a781cq.luksarcenter.ru 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.
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