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BIMI
The modern handbook on BIMI
See how verified brand logos work on top of strong DMARC enforcement and the records required to publish them.
By
Michael Ko & Matthew Whittaker
12 featured articles
92 min read
Updated 29 Apr 2026
Turn authentication
into visible
brand trust.
Suped
The modern handbook on
BIMI
Requirements
1
Does BIMI require DMARC enforcement policy 'p=reject' or 'p=quarantine'?
Learn if BIMI requires DMARC p=reject or p=quarantine enforcement. Understand the DMARC policy requirements for BIMI success and enhance email security.
5 min read
2
Does BIMI require strict DMARC alignment for both SPF and DKIM?
Discover if BIMI requires strict DMARC alignment for both SPF and DKIM. Learn the authentication protocols needed for brand logo display in emails.
7 min read
3
Is a VMC (Verified Mark Certificate) required for BIMI to display a logo?
Discover if a Verified Mark Certificate (VMC) is always required for BIMI logo display in email clients like Gmail and Yahoo, and explore self-asserted BIMI options.
9 min read
Logo and certificates
4
What image format is required for BIMI logos?
Learn the essential SVG image format requirements for BIMI logos, including SVG P/S, file size, technical specifications, and VMC integration.
7 min read
5
What are the specific requirements for an SVG image to be BIMI compliant?
Learn the specific SVG image requirements for BIMI compliance, including the SVG Tiny P/S profile, sizing, and security measures for your brand logo.
7 min read
6
A guide to validating your BIMI SVG and certificate
Validate your BIMI SVG, DNS record, HTTPS hosting, and VMC or CMC certificate before mailbox provider review.
9 min read
Mailbox support
7
Which email clients actually support BIMI?
See which email clients support BIMI, where Gmail, Yahoo, Apple Mail, Fastmail, and Outlook stand, and what to set up first.
8 min read
8
Can BIMI display a logo without a VMC?
Discover if BIMI logos can display without a VMC. Learn which email providers support it and why a VMC is still vital for brand recognition.
7 min read
9
Does BIMI add a new header to the email?
Discover if BIMI adds a new email header and how the BIMI-Selector header works to display your brand logo in inboxes.
6 min read
Business and verification
10
Understanding the business value and ROI of implementing BIMI
Learn how BIMI creates measurable business value, what it costs, and how to calculate ROI before rollout.
10 min read
11
A guide to BIMI accredited certificate providers
Compare BIMI accredited certificate providers, VMC vs CMC choices, DMARC requirements, and practical setup checks.
9 min read
12
VMC vs CMC: How to tell which BIMI certificate a domain is using
Learn how to identify whether a domain uses a VMC or CMC for BIMI by inspecting its BIMI record and certificate fields.
7 min read
On this page
Requirements
Logo and certificates
Mailbox support
Business and verification
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Are gradients allowed in BIMI SVG logos?
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What Happens to Your BIMI Logo and Blue Checkmark When Your VMC Expires?
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VMC vs CMC: How to tell which BIMI certificate a domain is using
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Understanding the business value and ROI of implementing BIMI
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A guide to BIMI accredited certificate providers
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A guide to validating your BIMI SVG and certificate
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Is Apple Business Connect the same as BIMI? a comparative guide
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Which email clients actually support BIMI?
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Previous
49-56 articles
DMARC FAQs
Answers to common questions about DMARC setup, monitoring, and enforcement.
What is BIMI?
Does BIMI require DMARC?
Do I need a VMC for BIMI?
Why is my BIMI logo not showing?
Is BIMI an email authentication protocol?
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