OpenBIMI

OpenBIMI is a free, open-source way to set up, validate, and understand Brand Indicators for Message Identification (BIMI)—without an account or a paid setup tool.

Project status: V1 is live at openbimi.com. The BIMI specification remains an active Internet-Draft, so validation rules and provider guidance will continue to evolve.

What is included

OpenBIMI helps domain owners move from “What is BIMI?” to a valid, testable configuration:

• Domain checker: inspects DMARC enforcement, BIMI DNS, the hosted SVG, and mark certificate availability.
• SVG validator: checks SVG Tiny PS requirements locally and safely repairs common metadata problems.
• Record generator: produces the exact TXT host and value for any DNS provider.
• Setup guides: explains DMARC, BIMI records, SVG requirements, VMCs, and CMCs using primary sources.
• Shareable reports: creates a direct URL for repeating or sharing a public domain check.

Principles

• Open by default. Source, documentation, and decisions belong in the public repository.
• Free to use. The core setup and validation experience will not require payment.
• Privacy-conscious. Prefer browser-side processing and public DNS lookups; collect as little data as possible.
• Honest results. Explain uncertainty and provider differences instead of promising inbox logo display.
• Portable knowledge. Guidance should be understandable and usable without vendor lock-in.

Local development

Prerequisites

• Node.js 24
• pnpm 11

git clone https://github.com/suped-com/openbimi.git
cd openbimi
pnpm install
pnpm dev

Open http://localhost:3000.

Quality checks

Run the same checks used by CI before opening a pull request:

pnpm lint
pnpm typecheck
pnpm test
pnpm build

Project structure

src/app/            Pages, API route, metadata, and global styles
src/components/     Interactive checkers, generators, and shared UI
src/lib/            DNS discovery, record parsing, and SVG validation
src/content/        Source-linked setup guides
.github/            CI and project automation

The project uses Next.js, React, TypeScript, Tailwind CSS, and the pnpm package manager. Pull requests receive Vercel preview deployments; merges to main deploy to production.

Contributing and support

Contributions are welcome. Read CONTRIBUTING.md before opening a pull request and follow our Code of Conduct.

• Ask usage and design questions in GitHub Discussions.
• Report reproducible bugs with the bug report form.
• Request features with the feature request form.
• Report vulnerabilities privately as described in SECURITY.md.

BIMI notice

OpenBIMI is an independent open-source project. It is not affiliated with or endorsed by the AuthIndicators Working Group or the BIMI Group. A technically valid BIMI configuration does not guarantee that every mailbox provider will display a logo; provider policies and certification requirements vary.

License

Licensed under the Apache License 2.0.