BIMI

Brand Indicators for Message Identification setup and logo requirements.

6 articles

March 2026

CaptainDNS · March 8, 2026

BIMI Logo Not Showing: 5 Common Errors and How to Fix Them

Valid DMARC, published BIMI record, but still no logo in the inbox. This guide identifies the 5 most common causes and details what to do.

Diagram of the three BIMI deployment tiers for an SMB: self-asserted, CMC, and VMC

CaptainDNS · March 2, 2026

BIMI Without a VMC: The Budget-Friendly Guide to Displaying Your Logo in the Inbox

BIMI isn't just for large enterprises. This guide covers the 3 deployment tiers (free, CMC, VMC), the DNS prerequisites, and 5 steps for small and mid-sized businesses.

CaptainDNS · March 2, 2026

SVG Tiny-PS: understanding the security profile required by BIMI

An SVG file can contain JavaScript, phishing links and tracking pixels. Learn how the SVG Tiny-PS profile neutralizes these threats to secure BIMI logos.

February 2026

CaptainDNS · February 28, 2026

BIMI logo: create a compliant SVG Tiny-PS file in 4 steps

A regular SVG file won't work for BIMI. This guide explains how to create, convert, and validate a compliant SVG Tiny-PS file.

November 2025

BIMI October 2025: lps=, ABNF, SVG/SVGZ formats and headers

CaptainDNS · November 13, 2025

BIMI Draft -11 dated 9 October 2025: what's changing and how to prepare

Revision -11 formalizes Local-Part Selectors (lps=), clarifies the discovery path, reaffirms SVG/SVGZ logos and reiterates DMARC and header requirements.

CaptainDNS · November 13, 2025

BIMI logo cache: run a brand refresh and make the new logo show up everywhere

Your logo changed but inboxes still display the old one? It is not only a DNS issue: mailbox providers cache BIMI assets. Discover how the cache layers work and how to plan a smooth BIMI migration.