DMARC with Brevo.

Authenticate the domain

Brevo's current setup can use automatic or manual authentication. Manual setup supplies a Brevo verification value, DKIM record or records and DMARC guidance.

• Copy only the values shown in your own Brevo account.
• If a DMARC record already exists, edit that one rather than publishing a second policy.
• Confirm the From domain used in campaigns matches the authenticated domain.

Preserve your reporting plan

A provider may suggest its own rua destination. DMARC supports more than one aggregate destination, so review the existing record and deliberately retain the addresses you require.

Verify after propagation

Brevo notes that domain authentication changes can take time to be detected. Use reports to confirm aligned DKIM and identify any applications still sending with an unauthenticated identity.