Syntax, DNS, SMTP, catch-all, provider, confirmation, and historical methods used to assess an email address.
Syntax, DNS, SMTP, catch-all, provider, confirmation, and historical methods used to assess an email address.
Design an email verification API that is fast at capture, explicit about uncertainty, privacy-conscious, and resilient to remote mail-server behavior.
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The two terms overlap, but separating address checks, mailbox evidence, ownership confirmation, and deliverability leads to better decisions.
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A step-by-step look at SMTP recipient checks, catch-all domains, temporary failures, and why a server response is evidence rather than a guarantee.
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A practical explanation of syntax, domain, mailbox, and risk checks—plus what a verification result can and cannot promise.
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