It opens BIMI in Gmail to small businesses and new brands that cannot afford or have not completed trademark registration.
Mistake 1: Expecting the blue checkmark; CMC does not qualify#
Why it hurts: this undermines Common Mark Certificates (CMC) at the point where mailbox providers make their decision, and it is rarely surfaced by your own tooling until placement drops.
Fix: Document at least 12 months of logo use (Wayback Machine snapshots, marketing materials).
Mistake 2: Changing the logo after issuance, which invalidates the certificate#
Why it hurts: this undermines Common Mark Certificates (CMC) at the point where mailbox providers make their decision, and it is rarely surfaced by your own tooling until placement drops.
Fix: Prepare the logo as SVG Tiny PS.
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.