What are best practices for BIMI logo usage, especially regarding multiple logos and selector support?

BIMI (Brand Indicators for Message Identification) enhances email marketing by displaying a brand's logo in recipients' inboxes, increasing brand visibility, trust, and engagement. Successful implementation depends on several best practices: First, correctly configure SPF, DKIM, and DMARC authentication protocols, as BIMI relies on DMARC and will not function without proper setup. Obtain a Verified Mark Certificate (VMC) to validate logo ownership and ensure it is a registered trademark. For logo strategy, begin with a single, consistent logo for brand recognition, although different logos can be used for distinct brands within an organization. While technically multiple selectors can exist, most services currently only utilize the default._bimi selector. Be aware of implementation costs, which include the VMC and potentially trademark registration fees. Currently, BIMI is supported by Gmail, Yahoo Mail, and Fastmail, with wider adoption anticipated. Beyond branding, BIMI also contributes to email security, domain reputation improvement, and better email marketing performance by preventing spoofing and ensuring recipients can trust the sender. Finally, BIMI records are published as DNS TXT records under the `default._bimi` subdomain, linking to the SVG logo file.

BIMI (Brand Indicators for Message Identification) allows brands to display their logo in recipients' inboxes, increasing brand visibility, trust, and engagement. Key best practices include ensuring proper SPF, DKIM, and DMARC authentication, starting with a single, consistent logo for brand recognition, and using different logos for distinct brands under one organization if needed. While technically multiple selectors can be used, most services currently only look at the default._bimi selector. BIMI's implementation costs include obtaining a Verified Mark Certificate (VMC) to validate logo ownership and trademark registration. Currently, BIMI is supported by Gmail, Yahoo Mail, and Fastmail, with broader adoption expected. Beyond brand awareness, BIMI also contributes to email security, domain reputation, and improved email marketing performance.

BIMI's functionality is reliant on properly configured DMARC authentication. This means SPF, DKIM, and DMARC must all be correctly implemented and passing for the BIMI logo to display.

BIMI requires a Verified Mark Certificate (VMC) and a registered trademark for the logo to ensure its validity and ownership, helping to prevent email spoofing and phishing attacks while enhancing brand recognition across supporting email clients. BIMI records are published as DNS TXT records under the `default._bimi` subdomain, containing the URL to the SVG logo file.