Email Verification with Live SMTP Proof

Email verification API with a live SMTP mailbox check: detects invalid and non-existent addresses, catch-all (accept-all) domains, disposable and temporary email, role accounts and domain typos — lowering bounce rate and protecting sender reputation. Answers deliverable only when it has proof. Where confirmation is impossible — Outlook and Yahoo never reveal it, catch-all domains accept everything, greylisting defers — the answer is risky or unknown with a machine-readable reason, not a guess dressed up as a fact.