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smtp-verification

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omm9846 / verdict

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Open-source Apollo alternative: cold-outreach engine that verifies every mailbox before sending. Email discovery, SMTP verification, bounce-proof delivery. Self-hosted or hosted. Free Hunter.io / Instantly / Clay alternative.

open-source nextjs self-hosted developer-tools email-verification email-finder ai-agents lead-generation email-deliverability growth-marketing cold-email cold-outreach sales-engagement outbound-sales smtp-verification b2b-lead-generation clay-alternative apollo-alternative hunter-io-alternative instantly-ai-alternative
  • Updated Sep 1, 2026
  • TypeScript

JamesonCodes / bulk-email-validator

Star 0

📫 Asynchronous email deliverability verifier that performs MX lookups, SMTP RCPT probes, and catch-all detection with retries, resume support, and CSV/JSON reporting.

python rate-limiting email-marketing asyncio email-verification mx-lookup data-quality csv-processing email-validator email-deliverability crm-integration email-cleanup vps-deployment async-processing bulk-email-verification disposable-email-detection smtp-verification lead-validation contact-verification catch-all-detection
  • Updated Oct 3, 2025
  • Python

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