Bulk email verification: live SMTP mailbox check, MX, catch-all, disposable and role detection.
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First seen 21 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
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| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | Email Verifier (SMTP, MX, Catch-All) | - | 21 Oct 2026 |