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BIMI lets supporting mailbox providers display a brand logo next to authenticated email. It is optional and does not replace SPF, DKIM, or DMARC.

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Typical prerequisites

  • SPF and DKIM are configured correctly.
  • DMARC aligns and uses an enforcement policy such as quarantine or reject.
  • The logo is a square, simple SVG hosted at a stable public HTTPS URL.
  • You have any certificate the target mailbox provider requires.
Some providers, including Gmail, can require a Verified Mark Certificate tied to a trademark before broad display. Provider requirements can change independently of Signal.
1

Prepare the logo

Use an SVG that remains legible at inbox-icon size. Serve the SVG itself over HTTPS without redirecting to an HTML page.
2

Save the hosted URL

Open the domain Configuration tab, paste the HTTPS SVG URL, and save. Signal stores the URL; it does not ask you to upload the image file.
3

Publish the BIMI record

Open Records and add the BIMI DNS record shown for the domain.
4

Verify

Run DNS verification after the record and logo URL are publicly reachable.

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Logo checks

  • Use a stable URL under a domain your organization controls.
  • Return an SVG content type.
  • Avoid scripts, external dependencies, and complex artwork.
  • Keep redirects and authentication out of the asset path.
  • Plan cache-safe updates because mailbox providers can retain the old image.
A verified BIMI record in Signal does not guarantee that every mailbox provider will display the logo. Each provider applies its own policy, reputation, certificate, and rollout decisions.