The direct answer
A checker evaluates the inputs it can see. It cannot guarantee how every recipient’s provider will authenticate a particular message or decide to display a logo.
What did the checker actually test?
Read the result’s scope: some tools inspect DNS, others also retrieve assets or evaluate certificate evidence. Save the checked domain, timestamp and individual results instead of only a green overall badge.
A result for the organisational domain may not describe the subdomain used by a particular sender. Likewise, a record lookup cannot establish the authentication outcome of a message that the tool never received.
What evidence closes the gap?
Send a real message through the intended service and inspect it in a supported recipient environment. Collect authentication results and note the provider, app and account context.
Compare that evidence with the checker output. If configuration and message checks succeed, investigate provider-specific display conditions and processing. Use the test plan to keep these layers separate and avoid random DNS changes.
Sources & further reading
Provider guidance checked on . Requirements can change; check the original guidance when implementing. Planning checklists and examples are BIMI World’s editorial suggestions.