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BIMI (Brand Indicators for Message Identification)

Display your brand logo next to your emails in supported email clients.

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What is BIMI?

BIMI allows your verified logo to appear in email clients that support it, increasing brand recognition and trust.
BIMI Example

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Requirements

Before setting up BIMI, you need:
1

DMARC Enforcement

DMARC policy must be set to quarantine or reject with pct=100.
2

Verified Mark Certificate (VMC)

A certificate from an authorized provider (required for some email clients).
3

SVG Logo

Your logo in SVG Tiny PS format.

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Logo Requirements

RequirementSpecification
FormatSVG Tiny 1.2 Portable/Secure
ShapeSquare
BackgroundSolid color (no transparency)
SizeAt least 32x32 pixels
File sizeUnder 32 KB

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BIMI Record

Add a TXT record to your domain: 
Type: TXT
Host: default._bimi
Value: v=BIMI1; l=https://example.com/logo.svg; a=https://example.com/vmc.pem

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Record Parameters

ParameterDescriptionRequired
v=BIMI1BIMI versionYes
l=URL to your SVG logoYes
a=URL to your VMC certificateNo*
*VMC is required for Gmail and some other clients.

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VMC Providers

Verified Mark Certificates are available from:
  • DigiCert
  • Entrust
VMC certificates require trademark registration and cost several thousand dollars annually.

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Setup in Lettr

const domain = await lettr.domains.update('dom_123', {
  bimi: {
    logoUrl: 'https://example.com/logo.svg',
    vmcUrl: 'https://example.com/vmc.pem' // Optional
  }
});

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Check BIMI Status

const domain = await lettr.domains.get('dom_123');

console.log({
  bimiStatus: domain.bimiStatus,
  bimiLogoUrl: domain.bimiLogoUrl
});

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Email Client Support

ClientSupport Level
GmailVMC required
Apple MailBasic BIMI (no VMC)
YahooVMC required
FastmailBasic BIMI

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Testing BIMI

Use these tools to validate your BIMI setup:
  1. BIMI Inspector - Check your DNS records
  2. BIMI Generator - Create compliant SVG logos
  3. Send test emails - Verify logo appears in supported clients
BIMI display depends on multiple factors including your domain reputation and the recipient’s email client. Not all emails will show your logo.