Question 1

What email clients support BIMI?

Accepted Answer

Gmail (requires VMC), Yahoo Mail, Apple Mail (iOS 16+/macOS Ventura+), and Fastmail support BIMI logo display. Microsoft Outlook uses its own logo system (BIMI is not supported).

Question 2

Do I need a VMC for BIMI to work?

Accepted Answer

A VMC (Verified Mark Certificate) is required for Gmail BIMI support. Yahoo Mail and Apple Mail can display BIMI logos without a VMC, relying only on a valid DMARC p=quarantine or p=reject policy and a properly hosted SVG logo.

Question 3

What SVG format does BIMI require?

Accepted Answer

BIMI requires SVG Tiny 1.2 Portable/Secure (SVG-P/S) format. Regular SVG files with filters, scripts, or external references are not accepted. The logo must be square, simple, and served over HTTPS.

Question 4

My BIMI logo is not showing in Gmail — why?

Accepted Answer

Gmail requires: (1) DMARC p=reject enforcement, (2) A valid VMC from a trusted CA (DigiCert or Entrust), (3) The VMC a= authority URL in the BIMI record, (4) SVG Tiny P/S format. Check all four prerequisites with this tool.