The short version

BIMI (Brand Indicators for Message Identification) puts your logo next to your mail in inboxes that support it. It’s the reward for enforcing DMARC: a receiver shows the logo only for a domain whose DMARC policy is p=quarantine or p=reject.

What it needs

  1. DMARC at enforcement. p=quarantine or p=reject, applied to all your mail. p=none doesn’t qualify, and Gmail asks that an older record with pct= has it at 100.

  2. A logo in SVG Tiny PS, a restricted form of SVG, square. Gmail asks for at least 96 by 96 pixels.

  3. A mark certificate, for Gmail: a Verified Mark Certificate (VMC) for a trademarked logo, or a Common Mark Certificate (CMC) otherwise. Without one, Gmail doesn’t show the logo.

  4. A BIMI record, a TXT record at default._bimi:

    default._bimi.example.com.  TXT  "v=BIMI1; l=https://example.com/logo.svg; a=https://example.com/mark.pem"

    l= is the logo’s URL and a= the certificate’s.

Gmail’s requirements are in its BIMI setup guide, read on 9 November 2026. Other mailbox providers support BIMI to different degrees.

Getting there

BIMI comes last, after DMARC is enforcing. The path is DMARC at p=none with reports, every sender aligned, then quarantine by day 30 and reject from day 60. In DMARCLoop, the domain’s Mail security tab checks the BIMI record, the logo and the certificate daily once you publish them; see DKIM keys and BIMI.