MailTester Email Verification
Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.
likely compatible
Declares API key header (Authorization); use Copilot Studio 'API key' → Header.
Rule R2b · what this means · Not tested in Copilot Studio.
| Registry name | com.mailtester/email-verification |
| Endpoint used for verdict | https://app.mailtester.com/mcp |
| Transports | streamable-http |
| Auth (Copilot Studio setting) | API key (header) |
| Last endpoint check | 2026-10-20T18:11:49Z · initialize OK |
| GitHub | mailtester-com/mailtester-mcp |
| Website | https://app.mailtester.com/agent-gateway |
| Version | 1.0.1 |
| Registry updated | 2026-10-08 |
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Is this wrong or out of date? Email us. Data built 2026-10-20.