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Email verification and finder run on mail servers Bytecheck operates
Grounded in available product and source data
Bytecheck checks whether an email address can actually receive mail, and it runs those checks on mail servers it operates itself instead of reselling someone else's results. You can check one address, upload a whole list, or call the REST API from your own tooling.
When a result is not clear, the address goes to a second server and stays marked as unknown rather than being guessed. Repeated addresses in a list count only once, and the finder spends credits only when it actually turns up a mailbox.
