The direct answer
Yes, the issued public BIMI certificate bundle is intended for receiver access. That does not mean every file ending in .pem is safe to publish: PEM can encode different kinds of material.
Which file should the web team receive?
Google’s setup instructions call for the public certificate PEM and its chain to be hosted for retrieval. Obtain the deployment bundle and instructions from the issuer, and confirm the file’s contents before handing it to the hosting owner.
Do not publish private-key blocks, account credentials or an entire certificate-application export. The filename extension alone cannot tell you whether a file contains only public certificates.
What belongs in a safe hosting handoff?
Provide the approved public bundle, intended URL, expected certificate identity and expiry date. Keep registration documents and identity evidence in their designated private application channel.
After publishing, retrieve the exact URL and confirm that it serves the intended certificate data. If the supplied bundle is ambiguous, ask the issuer to identify the correct public file rather than choosing whichever PEM file happens to open in a text editor.
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.