Authentication
BIMI (Brand Indicators for Message Identification)
A standard that displays your verified brand logo next to authenticated emails in supporting inboxes, requiring a valid DMARC policy at enforcement.
How BIMI works
You publish a TXT record at default._bimi.yourdomain.com that points to your logo in SVG Tiny PS format. Supporting mailbox providers show that logo as the sender avatar, but only for mail that passes DMARC.
What you need first
- A DMARC policy at enforcement: p=quarantine or p=reject, not p=none.
- Your logo converted to the SVG Tiny PS profile.
- For Gmail and Apple Mail, a Verified Mark Certificate (VMC) or Common Mark Certificate, which usually requires a registered trademark.
Is it worth it?
BIMI doesn’t improve deliverability directly, but it’s a visible reward for doing authentication properly, and a logo makes your mail easier to recognize and harder to impersonate. The real value is the DMARC enforcement you need to get there.
Let MailCraft handle the details
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Start freeRelated terms
Full glossaryAuthentication
DMARC
A DNS policy that tells receiving servers what to do with mail that fails SPF/DKIM alignment (none, quarantine, or reject), and provides aggregate reports on who’s sending as your domain.
Authentication
DKIM (DomainKeys Identified Mail)
A cryptographic signature added to outgoing email that lets receiving servers verify the message really came from your domain and wasn’t altered in transit.
Deliverability
Sender reputation
A score mailbox providers maintain for a sending domain or IP based on engagement, complaints and bounces, which determines whether your mail reaches the inbox, spam, or gets rejected outright.