BIMI Checker & Generator
Look up and validate a domain's BIMI record, preview the brand logo, and generate a correct BIMI TXT record - checked from our EU servers.
About BIMI Checker & Generator
BIMI (Brand Indicators for Message Identification) is an email standard that lets a verified brand logo appear next to authenticated messages in supporting mailboxes such as Gmail, Apple Mail, Yahoo and Fastmail. The logo is published as a DNS TXT record and only displays once the sender's email authentication is in order.
Enter a domain - and optionally a selector, where the default is "default" - and the checker fetches the TXT record at selector._bimi.domain, confirms it begins with v=BIMI1, and reads the l= logo URL and the a= VMC certificate URL. It then flags problems: a missing or non-HTTPS logo URL, a logo that is not the required SVG Tiny PS format, or a missing Verified Mark Certificate.
BIMI only works on top of enforced DMARC. The tool cross-checks the domain's DMARC record and reports an error when there is no policy or the policy is p=none, because mailboxes will not show a logo unless DMARC is set to quarantine or reject. It also notes that Gmail specifically requires a VMC, referenced by the a= tag, before it will render the logo.
Beyond checking, the generator assembles a syntactically correct v=BIMI1 TXT record from your logo and certificate URLs, and the tool previews the referenced logo so you can confirm the right image is being served. Lookups run server-side from EU infrastructure.
How to use it
- 1Enter the domain to inspect, plus a selector if you use one other than the default.
- 2Run the check; the server reads the TXT record at selector._bimi.yourdomain and parses its tags.
- 3Review the findings: the logo URL, any VMC certificate, and any errors or warnings about HTTPS, SVG format, or DMARC enforcement.
- 4Preview the logo to confirm it is the image you expect recipients to see.
- 5To publish BIMI, use the generator to build a correct record from your logo and VMC URLs, then add it to DNS.
Common use cases
- -Verifying that a newly published BIMI record is valid before expecting logos to appear
- -Diagnosing why a brand logo is not showing in Gmail or Apple Mail
- -Confirming the DMARC enforcement prerequisite for BIMI is actually met
- -Generating a correctly formatted BIMI TXT record when rolling out brand indicators
- -Auditing a domain's email brand setup as part of a deliverability review
Frequently asked questions
- What is BIMI?
- BIMI (Brand Indicators for Message Identification) is a standard that displays a verified brand logo beside authenticated emails in supporting mailboxes. The logo is published in DNS and appears only when the domain's email authentication passes.
- What are the requirements for BIMI to work?
- A domain needs an enforced DMARC policy (p=quarantine or p=reject), a BIMI TXT record at selector._bimi.domain pointing to an HTTPS-hosted SVG Tiny PS logo, and - for Gmail and some others - a Verified Mark Certificate referenced by the a= tag.
- Where is a BIMI record published?
- At the DNS name selector._bimi.domain as a TXT record, where the selector is usually "default". The record begins with v=BIMI1 and contains an l= tag for the logo URL and, optionally, an a= tag for the VMC.
- Why isn't my brand logo showing in Gmail?
- The most common reasons are DMARC not set to quarantine or reject, a missing Verified Mark Certificate (Gmail requires one via the a= tag), or a logo that is not a valid HTTPS-hosted SVG Tiny PS file. The checker flags each of these.
- What image format does a BIMI logo need to be?
- BIMI logos must be SVG Tiny Portable/Secure (SVG Tiny PS) files served over HTTPS. Ordinary SVGs, PNGs and JPEGs are not accepted, and a non-SVG or non-HTTPS logo URL is flagged by the validator.
- What is a VMC and do I need one?
- A Verified Mark Certificate (VMC) is a certificate attesting that you own the logo, referenced by the a= tag in the BIMI record. Gmail and some other mailboxes require a VMC before they will display the logo, so in practice it is needed for broad support.