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Insights on email verification, deliverability, and building better email lists.

Catch All Email Verification
GuideDec 23, 2025

Catch All Email Verification

Learn how catch-all (accept-all) email verification works, why most providers use unreliable heuristics, and how True-Send verification delivers real results at the lowest price.

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Open Source Email Verifier
Open SourceDec 23, 2025

Open Source Email Verifier

We're open sourcing our email verification engine. Free, self-hosted email verification with no limits, no API keys, and no monthly fees.

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