BIMI Lookup Tool
Check Brand Indicators for Message Identification records
Ready to Check BIMI Records
Enter a domain name above to check its BIMI configuration and brand logo settings.
This page provides original, human-reviewed information about BIMI record validation, including VMC certificate requirements, SVG logo constraints, and how BIMI interacts with DMARC alignment.
BIMI (Brand Indicators for Message Identification) is an email authentication standard that allows brands to display their logo in email clients when their emails pass authentication checks.
Key Components:
- v=Version (currently BIMI1)
- l=Logo URL (SVG format)
- a=Authority Evidence (VMC certificate)
Benefits:
- Enhanced brand recognition in email clients
- Improved email deliverability and trust
- Protection against brand impersonation
- Better user engagement with branded emails
Prerequisites:
- DMARC policy set to "quarantine" or "reject"
- SPF and DKIM authentication properly configured
- SVG logo file hosted on HTTPS
- VMC (Verified Mark Certificate) from authorized CA
Setup Steps:
- Create an SVG version of your logo (square format recommended)
- Host the SVG file on a secure HTTPS server
- Obtain a VMC certificate from an authorized Certificate Authority
- Create a BIMI DNS TXT record at default._bimi.yourdomain.com
- Test your BIMI implementation using validation tools
Example BIMI Record:
v=BIMI1; l=https://example.com/logo.svg; a=https://example.com/vmc.pemLogo Not Displaying:
- Verify DMARC policy is set to "quarantine" or "reject"
- Check that SPF and DKIM are passing
- Ensure logo URL is accessible via HTTPS
- Validate SVG format and size requirements
DNS Record Issues:
- Check DNS propagation (can take up to 48 hours)
- Verify record is published at default._bimi.domain.com
- Ensure proper TXT record format
- Check for syntax errors in the BIMI record
VMC Certificate Problems:
- Verify certificate is from an authorized CA
- Check certificate expiration date
- Ensure certificate matches your domain
- Validate certificate chain integrity
Do I need a VMC certificate?
While not always required, a VMC certificate is highly recommended and required by some email providers like Gmail for logo display.
What logo format should I use?
BIMI requires SVG format logos. The logo should be square (1:1 aspect ratio) and optimized for small display sizes.
Which email clients support BIMI?
Major email clients including Gmail, Yahoo Mail, Fastmail, and others support BIMI. Support is continuously expanding.
How long does BIMI take to work?
After proper setup, BIMI can take 24-48 hours to propagate. Email providers may also have their own validation periods.
Can I use BIMI without DMARC?
No, BIMI requires a DMARC policy set to "quarantine" or "reject" with proper SPF and DKIM authentication.
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