How to apply BIMI to a specific subdomain instead of the entire domain?
Summary
What email marketers say7Marketer opinions
Email marketer from dmarcian recommends creating a specific BIMI record for each subdomain you want to enable BIMI on. They emphasize that a properly configured DMARC policy (p=quarantine or p=reject) is a prerequisite for BIMI to function and encourage validation of the subdomain's DNS settings.
Email marketer from StackOverflow shares that in order to get BIMI working on a subdomain it needs its own DNS record in the subdomain. The record should follow the structure `default._bimi.subdomain.example.com` where the subdomain is included. Ensure you add the URL location of the svg logo.
Email marketer from Valimail shares that to use BIMI on a subdomain, you need to create a separate BIMI record specifically for that subdomain. This involves adding a TXT record to the subdomain's DNS settings with the appropriate BIMI information, including the location of the SVG logo and the associated VMC. This allows you to have different logos for different subdomains, offering more granular control over branding.
Email marketer from Reddit shares that setting up BIMI for a subdomain requires creating a separate DNS record specifically tailored to that subdomain. Ensure your DMARC policy is enforced (p=quarantine or p=reject) and that the subdomain has its own valid SSL certificate for the logo to be displayed correctly. Add TXT record to DNS settings.
Email marketer from EmailOnAcid shares that BIMI configuration on subdomains requires creating a BIMI-specific DNS TXT record for each relevant subdomain. Ensuring each subdomain carries its distinct BIMI record allows for granular branding control.
Email marketer from OnlyMyEmail shares that applying BIMI to a subdomain involves creating a specific DNS TXT record for that subdomain. This record points to the location of the SVG logo file that should be displayed for emails originating from that subdomain. The process is similar to setting up BIMI for the main domain, but the DNS record is created for the subdomain instead.
Email marketer from Mailhardener explains that to set up BIMI for a specific subdomain, you need to create a BIMI DNS TXT record for that subdomain. This involves adding a TXT record to the subdomain's DNS settings, pointing to the SVG logo location. Doing this for each subdomain allows for distinct logos per subdomain.
What the experts say3Expert opinions
Expert from Email Geeks explains that BIMI trickles down to subdomains from the apex level by default. To apply BIMI only to a subdomain, move the BIMI DNS record to the subdomain level, changing the hostname to include the subdomain (e.g., `default._bimi.test.usnews.com`). He confirms this method should work without breaking the VMC certificate and advises having only one BIMI record in DNS for the subdomain.
Expert from Spam Resource explains that BIMI on subdomains involves setting up individual BIMI records for each subdomain. You'll need to create a DNS TXT record following the format `default._bimi.subdomain.example.com` pointing to your SVG logo. The subdomain must also have its own DMARC policy, SPF, and DKIM to validate the email.
Expert from Word to the Wise shares that to apply BIMI to a subdomain, the process involves configuring a specific BIMI record directly within the DNS settings of that subdomain. This includes establishing a TXT record in the format 'default._bimi.subdomain.domain.com' and ensuring that all prerequisite authentication mechanisms (SPF, DKIM, and DMARC) are properly configured for the subdomain.
What the documentation says3Technical articles
Documentation from Entrust explains that to apply BIMI to a subdomain, create a DNS record specifically for that subdomain. The record name should follow the format `default._bimi.subdomain.example.com`, and the record value should point to the location of your SVG logo file. Ensure that the subdomain also has valid SPF, DKIM, and DMARC policies in place for BIMI to function correctly.
Documentation from Agari explains that BIMI supports subdomain implementations by allowing you to define unique BIMI records for each subdomain. This is achieved by creating TXT records under the '_bimi' subdomain for each specific subdomain (e.g., _bimi.marketing.example.com). This enables organizations to tailor their visual branding across different parts of their email ecosystem.
Documentation from DigiCert explains that BIMI can be applied to subdomains by creating a DNS TXT record specifically for the subdomain. The record should include the BIMI record name (default._bimi) combined with the subdomain (e.g., default._bimi.subdomain.example.com). This allows different BIMI logos to be displayed for different subdomains.