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BIMI checker for DNS and brand logo readiness

Use this BIMI checker workflow to verify BIMI DNS records, logo requirements, and DMARC prerequisites before mailbox logo rollout.

This BIMI checker page explains what to validate before and after publishing BIMI DNS records.

If you need the concept before the checklist, read What is BIMI? first. If you are already ready to publish, follow How to create a BIMI record alongside this page.

Quick answer

Use MailSlurp BIMI and authentication checks to confirm the BIMI record exists, the logo asset is reachable, and DMARC enforcement is strong enough for mailbox logo rollout. BIMI should be treated as part of sender-auth posture, not as a standalone logo task.

Run the live BIMI check

Use the interactive lookup tool:

Need to create records first?

BIMI checker requirements

A complete BIMI validation should confirm:

  1. a valid BIMI TXT record exists at default._bimi.yourdomain.com
  2. the record uses valid v=BIMI1 syntax and logo URL fields
  3. logo assets are hosted over HTTPS and accessible
  4. DMARC is properly configured and enforced
  5. sender authentication remains stable after deployment

Common BIMI failures

BIMI record missing or malformed

Recreate the TXT value using the BIMI record generator and republish DNS.

DMARC prerequisites not met

Check policy and alignment with the DMARC checker.

Logo URL is unreachable

Verify HTTPS accessibility and cache behavior from target mailbox providers.

MailSlurp BIMI readiness workflow

  1. Validate SPF, DKIM, and DMARC for the sender domain.
  2. Confirm DMARC policy is enforced before relying on BIMI rollout.
  3. Publish or update the BIMI record.
  4. Run the BIMI lookup and DNS checks.
  5. Test real message headers and inbox placement after the change.
  6. Monitor the sender domain so authentication drift does not silently break brand-logo readiness.