What is BIMI?
BIMI, or Brand Indicators for Message Identification is a relatively new email standard that allows you to add your brand’s logo to your authenticated emails. Adopting BIMI will allow your brand’s logo to appear next to your emails in your recipient’s inbox without manually needing to add and maintain it on a provider by provider level. As long as the email client supports BIMI, your logo will appear.Which email providers support BIMI?
A growing number of email provider’s are currently supporting BIMI with many more currently considering it. The current list of supported providers are:- Gmail
- Google Workspace
- Apple Mail (macOS Ventura 13, iOS 16, and iPadOS 16, or later)
- AOL
- Netscape
- Fastmail
- Yahoo (Yahoo Japan is not currently supported but is under considering for future adoption)
- Pobox

How does BIMI actually work?
Setting up BIMI will take a bit more work than simply uploading your brand’s logo and hitting save. Technically speaking, BIMI is a text file that lives on your sending servers and works hand in hand with DKIM, SPF, and DMARC protocols. At a broad level, after you send an email, your recipient’s email provider will look up your BIMI text file and attempt to verify the legitimacy of it. Once verified, your BIMI text file points the email provider to where they can find your logo and they will then attach it to your email. To start, the sender (you) will need to ensure that you are DMARC compliant. DMARC (domain-based Message Authentication, Reporting, & Conformance) is an email authentication policy and reporting protocol that defends against unauthorized use of domains. Basically, DMARC helps protect your brand by detecting emails that aren’t coming from your domain – preventing spoofing and phishing attempts. The email provider will also run through the Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) protocols to ensure that the sender’s email address was sent from the correct domain. Next, you will need to create the logo that will actually be used. The current recommendation is a square SVG file. The naming convention of this file should be:https://yourservername.com/logo.svg
Next is an optional but recommended step. To fully embrace BIMI, your brand should acquire a VMC, or a Verified Mark Certificate. This will help validate the true ownership of the logo being used. More on this in the section below.
Finally, you will need to create a TXT record for BIMI in your DNS records. This record will contain a URL to your logo for the email provider to grab and display.
The full implementation guide from BIMI can be located here.