The Free SendGrid Alternative for Email Deliverability Checks

Korpo.pro goes beyond SendGrids basic authentication setup: free SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, and BIMI analysis for any domain in one click.

Check Your Domain Free →

Why choose Korpo.pro over SendGrid?

✓Free — no SendGrid API plan required
✓7-protocol deliverability audit vs SendGrids limited DNS helpers
✓DMARC policy checking SendGrid doesnt fully cover
✓MTA-STS, TLS-RPT, and BIMI support missing from SendGrid
✓Provider-agnostic — works across all ESPs, not just SendGrid
✓Unified 0-100 deliverability score for at-a-glance health checks

7-Point Deliverability Audit

✓

SPF

✓

DKIM

✓

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