BIMI — your logo in the inbox
Authenticates your brand mark next to your sender name in supported clients. Requires DMARC at quarantine or reject, plus a Verified Mark Certificate for Gmail and Apple.
BIMI (Brand Indicators for Message Identification) lets you publish a logo that supported inboxes render next to your sender name. As of 2025, Gmail, Yahoo, AOL, Fastmail, and Apple Mail all support it.
The BIMI record
dns_bimi.acme.dev. IN TXT "v=BIMI1; l=https://acme.dev/logo.svg; a=https://acme.dev/vmc.pem"- l= — URL of your SVG logo (specific BIMI-compliant subset of SVG 1.2 Tiny PS).
- a= — URL of your Verified Mark Certificate (VMC). Required by Gmail, Apple, Yahoo. Not required by Fastmail.
Prerequisites
BIMI does not light up unless every box below is checked.
- DMARC policy of p=quarantine or p=reject (none does not qualify).
- pct=100 in your DMARC record (no partial enforcement).
- A registered SVG Tiny 1.2 PS logo, square aspect ratio, ≤32KB.
- A VMC (Verified Mark Certificate) issued by Entrust or DigiCert — a year-long process for trademark verification.
Common Mark Certificates (CMC)
In 2024 Gmail introduced a lower-tier CMC for unregistered marks. Cheaper and faster, but with a smaller logo and a "Verified" badge that says "trademark not verified" on hover. Worth it if you want the badge but cannot get a VMC.
The SVG specification
BIMI requires SVG Tiny 1.2 Portable Secure (PS) — a tiny subset of full SVG. No external references, no scripts, no CSS, single root <svg>, baseProfile="tiny-ps", and a viewBox attribute. Most logos need a redraw to comply; we provide a free linter in the dashboard.