Validation baselinedraft-brand-indicators-for-message-identification-14
Active Internet-Draft Mailbox-provider matrix
| Provider | Receiver support | Evidence path | Important local rules | Primary source |
|---|---|---|---|---|
| Gmail | Supported | VMC or CMC required | DMARC must use quarantine or reject at full coverage. Gmail accepts VMC and CMC evidence; the verified checkmark is associated with VMC senders. | Google Workspace Admin Help |
| Apple Mail | Supported | Evidence and strong authentication | Supported in iOS 16, iPadOS 16, macOS Ventura 13 or later, and iCloud.com. Apple describes digitally certified logos and evidence documents. | Apple Support |
| Yahoo Mail / AOL | Supported with local policy | Certificate not stated as mandatory | Yahoo documents a valid BIMI SVG, enforced DMARC, bulk sending, and sufficient reputation and engagement. Display remains a local decision. | Yahoo Sender Hub |
| Fastmail | Supported | VMC optional | Fastmail documents enforced DMARC, SVG Tiny PS, and a logo below 16 KB. It treats a VMC as optional while noting that other receivers can require one. | Fastmail Help |
| Outlook / Exchange Online | No receiver rendering documented | Not supported as a receiving client | Microsoft support material says Exchange Online and Outlook do not currently render BIMI as receivers. Some Microsoft sending products can publish BIMI for other inboxes. | Microsoft Learn |
How to read this matrix
Supported is not guaranteed
It means the provider documents or operates BIMI. It does not promise display for a particular sender or message.
Evidence varies
Some providers require a VMC or CMC. Others can use a self-asserted logo but still apply local policy.
Primary sources win
When this page and a linked provider document disagree, follow the provider’s current documentation and report the mismatch.
Provider policy changed?
Open a correction with the official source and its effective date.