BIMI

Brand Indicators for Message Identification setup and logo requirements.

10 articles

April 2026

Diagram showing the process of obtaining a VMC or CMC certificate for BIMI

CaptainDNS · April 1, 2026

VMC and CMC Certificates for BIMI: How to Choose, Buy and Deploy

Complete guide to obtaining and deploying a VMC or CMC certificate: CA comparison, pricing, prerequisites and free hosting.

March 2026

CaptainDNS · March 31, 2026

BIMI logo hosting: where and how to host your SVG logo and certificate

Hosting is BIMI's overlooked weak link. This guide compares 5 options, covers HTTPS requirements, and walks you through a step-by-step tutorial with CaptainDNS.

CaptainDNS · March 23, 2026

Gmail Verified vs Google Verified: understanding the real differences

The Gmail blue checkmark and the Google verified badge rely on entirely different mechanisms. This guide breaks down the technical prerequisites, costs, and steps for each verification.

The 4 email security tools managed by CaptainDNS: MTA-STS, BIMI, TLS-RPT and DMARC

CaptainDNS · March 13, 2026

Email Security: 4 Free Managed Tools to Protect Your Domains

CaptainDNS offers four free tools to secure your emails: MTA-STS hosting, BIMI hosting, TLS-RPT monitoring and DMARC monitoring. No infrastructure to manage.

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.