The general consensus is that displaying a logo in Yahoo Mail without DMARC and BIMI records is not reliably possible anymore. While Yahoo may have had legacy logo display programs or databases, these are outdated, unreliable, and no longer officially supported. BIMI (Brand Indicators for Message Identification) is the current recommended standard and requires DMARC compliance, specifically a policy of 'quarantine' or 'reject' enforced on both the parent domain and any subdomains. Proper email authentication and maintaining a good sender reputation are also essential for BIMI to work effectively.

The consensus is that displaying a logo in Yahoo Mail without DMARC/BIMI is generally not reliably possible anymore. While Yahoo may have had legacy logo display programs, these are outdated. The current standard, BIMI, requires DMARC. Building a strong sender reputation is also mentioned, but it's not a direct substitute for BIMI.

The responses indicate that displaying a logo in Yahoo Mail without DMARC/BIMI is not reliably possible anymore. While a legacy Yahoo logo database existed, it's no longer the recommended approach. BIMI (Brand Indicators for Message Identification) is the primary method, and it requires DMARC enforcement on the parent domain and subdomains. Proper email authentication and maintaining a good sender reputation are also essential for BIMI to work effectively.

The documentation confirms that Yahoo supports BIMI (Brand Indicators for Message Identification) as the method for displaying logos in their email service. DMARC (Domain-based Message Authentication, Reporting & Conformance) compliance is an essential prerequisite for BIMI. The specifics include a valid DMARC record with a policy of 'quarantine' or 'reject', a properly formatted SVG logo, and a VMC (Verified Mark Certificate), which is optional but recommended.