The Free ZeroBounce Alternative for Email Deliverability

Korpo.pro is the free ZeroBounce alternative for email deliverability: check SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, and BIMI in one click instead of just list cleaning.

Check Your Domain Free →

Why choose Korpo.pro over ZeroBounce?

✓Free — no per-credit pricing like ZeroBounce
✓Full authentication audit vs ZeroBounces list-validation focus
✓7-protocol check including MTA-STS, TLS-RPT, and BIMI
✓Instant DNS record analysis and scoring
✓No list uploads needed — just enter a domain
✓API access included for automated deliverability monitoring

7-Point Deliverability Audit

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SPF

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DKIM

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DMARC

✓

MX

✓

MTA-STS

✓

TLS-RPT

✓

BIMI

Try it now — free

Other Alternatives

Mail-Tester Alternative MXToolbox Alternative DMARC Analyzer Alternative DMARC Report Alternative EasyDMARC Alternative Valimail Alternative DMARCLY Alternative Postmark DMARC Alternative Proofpoint Alternative Barracuda Alternative Mimecast Alternative Google Postmaster Tools Alternative dmarcian Alternative PowerDMARC Alternative Trustifi Alternative Red Sift Alternative Agari Alternative ZeroBounce Alternative Mailchimp Alternative SendGrid Alternative Mailgun Alternative IntoDMARC Alternative Validity 250ok Alternative Bouncer Alternative Mailtrap Alternative