Does BIMI require a reject policy on the top level domain if subdomains have it?
Summary
What email marketers say8Marketer opinions
Email marketer from EmailonAcid shares that a DMARC policy set to either 'quarantine' or 'reject' is needed for both the organizational domain and its subdomains.
Email marketer from Reddit explains that for BIMI to work, you need DMARC set to quarantine or reject on your sending domain, including subdomains.
Email marketer from Email Geeks shares that the minimum DMARC policy for BIMI to work is quarantine p=100, anything below that (none or quarantine at <100%) and BIMI won’t work. *(results at individual MBPs may vary)
Email marketer from OnlyMyEmail explains that to use BIMI, your sending domain and subdomains need DMARC protection set to either 'quarantine' or 'reject'.
Email marketer from EmailToolTester details that one requirement is DMARC set to either Quarantine or Reject, which must be active for both the main domain and any subdomains used for sending.
Email marketer from SocketLabs notes that for BIMI implementation, DMARC needs to be set to either quarantine or reject on both the organizational domain and any sending subdomains.
Email marketer from Mailjet explains that BIMI requires a DMARC policy to be set to either 'quarantine' or 'reject'. This needs to cover not only the domain, but also any subdomains that send emails.
Email marketer from ZeroBounce explains that BIMI necessitates a DMARC policy set to either quarantine or reject on both the top-level domain and all subdomains that send email.
What the experts say2Expert opinions
Expert from Word to the Wise explains that BIMI requires strict enforcement. All sending domains, including subdomains, must have a DMARC record with a policy of either “quarantine” or “reject”.
Expert from Email Geeks explains that BIMI requires that the registered top-level Organizational Domain and all subdomains be covered by a DMARC “reject” (or 100% “quarantine”) policy.
What the documentation says3Technical articles
Documentation from dmarcian outlines that for BIMI, a DMARC policy of either quarantine or reject must be in place and enforced at the organizational level, impacting all sending domains and subdomains.
Documentation from BIMI Group explains that BIMI requires a DMARC policy with either 'reject' (p=reject) or 'quarantine' (p=quarantine) set for the organizational domain and any subdomains sending mail.
Documentation from Valimail describes how BIMI requires a DMARC policy set to either quarantine or reject, and this policy must apply to both the organizational domain and any subdomains used for sending email.