BIMI | DMARC Engine

19 June 2026 · 13 min read

How BIMI displays in Gmail and Apple Mail

Gmail and Apple Mail both reward an enforced DMARC domain with a verified logo, but each shows it differently and both demand a certificate. Here is what each provider displays, why a Verified Mark Certificate is non-negotiable, and how to test the whole BIMI chain before you rely on it.

18 June 2026 · 11 min read

Preparing a BIMI logo: SVG Tiny PS

BIMI only accepts one restricted image dialect: SVG Tiny PS. Here is what that profile requires, the squareness and sizing rules that catch people out, how to host the file over HTTPS, and the validation failures that come up again and again.

17 June 2026 · 11 min read

BIMI VMC vs CMC certificates

The two BIMI mark certificates compared: what a Verified Mark Certificate and a Common Mark Certificate are, who issues them, what they really cost, and which mailbox providers accept which.

6 June 2026 · 11 min read

Do you actually need BIMI?

An honest decision guide to BIMI: what it really requires, what a VMC costs, the CMC alternative, the SVG Tiny PS rules, and who should skip it.

6 June 2026 · 12 min read

The BIMI selector explained

The selector is the label in front of _bimi that tells a receiver which logo record to fetch. Here is how the default._bimi lookup and the BIMI-Selector header actually work, and the real cases where you would publish a non-default selector for seasonal, multi-brand or test logos.

4 June 2026 · 12 min read

CMC: BIMI for unregistered logos

A Common Mark Certificate lets brands without a registered trademark show a verified BIMI logo. Here is how a CMC is checked, how it differs from a VMC, and where it is accepted today.

1 June 2026 · 13 min read

Designing a logo that passes BIMI

A BIMI logo is not your website logo exported to SVG. It is a purpose-built coin: square canvas, solid background, the mark centred in a circular safe zone, and the SVG Tiny PS shell added by hand. Here is how to design one that reads clearly at avatar size and gets past the validators.

13 May 2026 · 11 min read

What is BIMI and is it worth it?

BIMI puts your brand logo beside authenticated mail, but only after DMARC enforcement and, for the big providers, a paid certificate. Here is what it shows, what it costs, and an honest view of who actually benefits.

9 April 2026 · 14 min read

Getting a trademark for a BIMI VMC

A Verified Mark Certificate will not issue without a registered figurative trademark for your logo. Here is why that prerequisite exists, the real registration timeline and cost, and the CMC route for organisations that have no trademark.

14 March 2026 · 11 min read

BIMI VMC cost and certificate authorities

What a Verified Mark Certificate actually costs, which CAs issue them (DigiCert and Entrust), how trademark and entity validation works, and what to watch at renewal so your logo never silently disappears.