What is logo treatment best practice for deliverability?
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Your logo is one of the first things spam filters evaluate. Host it on your own domain. Don't use a personal cloud storage link or a third-party image host. When spam filters see an image URL from a domain with bad reputation, they get suspicious. Your sending domain reputation is good. Your image hosting domain might not be. Put them together and filters see risk.
The best approach is BIMI: Brand Indicators for Message Identification. If you set it up, Gmail, Yahoo, and Apple Mail display your verified logo right next to your sender name in the inbox. It's a major trust signal. Readers see your actual brand logo and instantly know the email is legit.
BIMI requires three things. First, your DMARC record needs to be enforced at p=quarantine or p=reject. Second, you need a Verified Mark Certificate from an approved authority. Third, you add a BIMI record to your DNS. It's not trivial, but the inbox real estate payoff is huge.
In the meantime, here's your practical checklist. Keep logo file size under 30KB so it loads fast. Write real alt text like "Acme Inc" instead of "logo.png." Test that your logo displays on mobile without stretching. And here's the important one: make sure your logo's readable even when images are blocked. Consider adding your company name as text near the logo so subscribers still recognize you.
Start by moving your logo to a hosted domain you own. That's your first win. If BIMI interests you, ask your ESP if they support it. Most modern ones do. Once you're BIMI-verified, you'll see opens and clicks improve because subscribers trust the message more.
Related: brand consistency, email design best practices.
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