According to official documentation, the failure of a BIMI logo to display in Yahoo Mail after implementation is often tied to specific technical requirements. The DMARC policy must be set to 'quarantine' or 'reject'; a 'none' policy will prevent the logo from appearing. Errors in the BIMI DNS record can also hinder display, necessitating careful verification of its format and accessibility. Furthermore, the SVG image must conform to particular format standards, be publicly accessible via HTTPS, and remain under 32KB in size. Finally, if using a VMC, it must be issued by an accepted Certificate Authority.