Setup checklist#
- ☐ Document at least 12 months of logo use (Wayback Machine snapshots, marketing materials).
- ☐ Prepare the logo as SVG Tiny PS.
- ☐ Complete organization validation with DigiCert or Entrust.
- ☐ Publish the certificate URL in the a= tag of your BIMI record.
Audit checklist#
- ☐ Confirm you are not: expecting the blue checkmark; CMC does not qualify.
- ☐ Confirm you are not: changing the logo after issuance, which invalidates the certificate.
Ongoing monitoring#
- ☐ Weekly: review provider dashboards (Postmaster Tools, SNDS) and bounce logs
- ☐ Monthly: re-run the setup verification after any vendor or DNS change
- ☐ Quarterly: full audit against this checklist
Frequently asked questions#
Which providers accept CMC?
Gmail accepts CMC as of 2024. Apple accepts VMC and CMC. Yahoo does not require a certificate.
Can I upgrade from CMC to VMC?
Yes, once the trademark registers. Reissue the certificate and update the a= tag.