What is logo treatment best practice for deliverability?

Logo treatment affects both deliverability and brand trust. Host logos on your own authenticated domain (images.yourdomain.com, not third-party hosts or personal cloud storage). This ensures the image URL matches your sending domain, which filters evaluate positively. Third-party hosting can trigger spam flags, especially if the hosting domain has mixed reputation.

BIMI (Brand Indicators for Message Identification) represents the gold standard for logo treatment. BIMI displays your verified logo directly in supporting inbox interfaces (Gmail, Yahoo, Apple Mail) next to your sender name. Implementation requires DMARC enforcement at p=quarantine or p=reject, a Verified Mark Certificate from approved authorities, and proper DNS records. The visual impact is significant: verified brand logos increase recognition and open rates.

Technical best practices: use appropriate file sizes (logo under 30KB, optimized for fast loading), provide meaningful alt text (your company name, not \"logo.png\"), and ensure the logo scales appropriately for mobile. Test that the logo displays correctly when images are blocked-consider adding your brand name as text near the logo. Your logo is the first brand signal recipients process; proper implementation ensures it builds trust rather than triggering suspicion.