Brand Indicators for Message Identification (BIMI) is an emerging email specification that allows organizations that have implemented strong DMARC protection to display authenticated brand logos beside incoming messages in supporting email clients.
1. Technical BIMI Prerequisites & SVG Tiny P/S Specifications
- DMARC Quarantine or Reject Policy: DMARC policy must be set to
p=quarantine(pct=100) orp=rejectacross the organizational domain. - SVG Tiny Portable/Secure (P/S) Format: Logos must strictly adhere to the SVG Tiny P/S XML profile (square aspect ratio, no external scripts or bitmap embeddings).
- Verified Mark Certificate (VMC): Issued by authorized Certificate Authorities (DigiCert, Entrust) confirming registered trademark ownership.
| BIMI Component | Technical Requirement | Validation Method |
|---|---|---|
| DNS Record | default._bimi.domain.com IN TXT "v=BIMI1; l=https://.../logo.svg; a=https://.../cert.pem;" | DNS TXT lookup |
| SVG Graphic Profile | SVG Tiny Portable/Secure (XML format, square viewBox) | W3C SVG Validator |
| Trademark Validation | Active USPTO / EUIPO registered trademark record | CA Proof of Ownership |