Supported inboxes

VMC: logo + blue checkmark. CMC: logo only.

Needs a participating mail provider to verify the evidence. Apple does not explicitly confirm CMCs.

Certificate-free logos depend on reputation and engagement. VMCs inform eligibility; CMC validation is not documented.

Certificate-free display is supported. SVG must be under 16 KB; CMC validation is not explicitly documented.

Explicitly requires a VMC or CMC, with aligned DMARC and a valid DKIM signature.

Without a VMC, request postmaster approval. A CMC is not documented as a substitute for that approval.

Zoho describes VMCs as required. No explicit receiver policy confirming CMC acceptance was found.

KDDI documents VMC verification. CMC and certificate-free policies are not specified.

Documents VMC validation and logos in message headers. Other certificate options are not specified.

Published receiver rules require a VMC to prove the right to use the logo.

DigiCert lists VMC compatibility. Onet confirms BIMI, but does not publish its other certificate rules.

BIMI is listed, but certificate rules are not confirmed. The separate trustedDialog service is not evidence of BIMI coverage.

BIMI is listed, but certificate rules are not confirmed. The directory’s linked provider page is no longer available.

Accounts moved to Yahoo use Yahoo’s rules. Certificate policies for remaining legacy accounts are unconfirmed.

Listed as not supporting BIMI. Logos from other Microsoft features are separate.