BIMI (Brand Indicators for Message Identification)

A DNS record that lets inboxes show your logo next to your emails, once DMARC is enforced.

BIMI lets a domain show its logo next to its emails in supporting inboxes, such as Gmail, Yahoo and Apple Mail. The logo comes from a TXT record published at default._bimi.yourdomain.com.

What it needs

A DMARC policy of quarantine or reject on the domain. A policy of none isn't enough.
The logo as an SVG file in a strict format called SVG Tiny PS, hosted over HTTPS.
For Gmail and Apple Mail, a paid mark certificate (a VMC or CMC) that proves you own the logo.

What it looks like

v=BIMI1; l=https://yourdomain.com/logo.svg; a=https://yourdomain.com/vmc.pem. The l tag points to the logo and the a tag to the certificate.

Is it worth it for cold email?

Rarely. BIMI rewards an established brand domain with strict DMARC; it doesn't make cold email land in the inbox. Cold email usually goes out from separate sending domains, where the certificate cost isn't worth it. Get SPF, DKIM and DMARC right first.

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