What Is BIMI#
Brand Indicators for Message Identification (BIMI) allows mail clients to display your company logo next to authenticated emails. Gmail, Apple Mail, and Yahoo Mail support BIMI. It requires a valid DMARC policy of p=quarantine or p=reject.
Prerequisites#
- SPF record passing
- DKIM signing enabled
- DMARC at
p=quarantine or p=reject with at least 30 days of clean history
- A Verified Mark Certificate (VMC) from DigiCert or Entrust (required for Gmail)
SVG Logo Requirements#
Gmail requires a Scalable Vector Graphic (SVG Tiny PS) format:
- Square aspect ratio
- No external references or scripts
- Under 32 KB file size
- Hosted at a public HTTPS URL
Validate your SVG at validator.bimigroup.org.
DNS Record Format#
Add a TXT record to your DNS:
Host: default._bimi.yourdomain.com
Type: TXT
Value: v=BIMI1; l=https://yourdomain.com/logo.svg; a=https://yourdomain.com/vmc.pem
The l= field is your SVG URL. The a= field is your VMC certificate URL (required for Gmail — optional for others).
Checking BIMI#
Use dig to confirm propagation:
dig TXT default._bimi.yourdomain.com
Gmail may take 1–2 weeks to start showing the logo after all checks pass. Use MXToolbox BIMI lookup to verify your record before testing in Gmail.
