The inbox verified badge.

To display a verified brand logo in your subscribers' email inboxes, you must implement BIMI. This requires DMARC authentication, a compliant SVG logo, and a verified certificate.

Your logo. In their inbox.

Creators, brands, and influencers can display their verified logo next to every email they send — just like a verified badge on Instagram. Here is how BIMI works and how to set it up.

The origin story.

Trace the evolution of BIMI from its 2018 working group origins through Gmail's rollout, VMC issuance, CMC introduction, and Apple Mail support — with a clear view of where the standard stands in 2026.

DMARC. Step by step.

The complete step-by-step guide to setting up DMARC in 2026. Move from p=none monitoring through p=quarantine to p=reject enforcement — the prerequisite for BIMI logo display in Gmail and Apple Mail.

BIMI without a certificate.

Self-asserted BIMI requires no VMC or paid certificate. Learn how to deploy BIMI for free on Yahoo Mail and AOL using DMARC enforcement, an SVG Tiny P/S logo, and a DNS TXT record.

BIMI for everyone else.

Small businesses and non-profits can deploy BIMI without a $1,200 VMC. Learn how self-asserted BIMI works today on Yahoo Mail, and how the Common Mark Certificate removes the trademark barrier entirely.

The complete guide.

The authoritative technical reference for BIMI implementation. SVG Tiny P/S specification, DMARC enforcement requirements, VMC vs. CMC certificate landscape, DNS record structure, and a complete implementation checklist.

The deliverability effect.

Learn how BIMI affects email open rates, brand recall, purchase likelihood, and inbox placement. Backed by Red Sift, Entrust, and DigiCert research.

The SVG Standard.

The complete DNS record.

A complete technical reference for BIMI TXT record syntax, covering the l= logo tag and a= certificate tag, supported configurations, and common misconfigurations.

The DNS record.

Gmail requires a certificate.

Logo not showing. Fixed.

Diagnose and fix the 7 most common reasons your BIMI logo is not appearing in email clients. Covers DMARC policy, SVG validation, MIME types, VMC/CMC certificates, DNS propagation, and client support.

Two certificates. One difference.

The Path to a Verified Mark Certificate

A complete step-by-step guide to obtaining a Verified Mark Certificate (VMC) for BIMI email authentication. Covers DMARC enforcement, trademark registration, SVG conversion, CA application, and DNS deployment.

The CA landscape changed.

Critical 2026 update: Entrust exited public certificate issuance. Learn which CAs now issue VMCs and CMCs, what happened to Entrust VMCs, and how to renew correctly.

The 12-Month Rule: Proving Logo Use for a Common Mark Certificate

Learn how to satisfy the Common Mark Certificate (CMC) proof-of-use requirement for BIMI without a registered trademark. Includes step-by-step guidance on using the Wayback Machine to document 12 months of continuous logo use.

The automation gap.

Let's Encrypt cannot issue Verified Mark Certificates (VMC) or Common Mark Certificates (CMC) because BIMI certificate issuance requires manual trademark verification that the ACME protocol cannot automate. Learn why VMCs cost $1,000+ and how the process works.

What Is a Mark Verifying Authority (MVA)? How VMCs Are Issued

Learn how the MVA ecosystem works, which Certificate Authorities are approved to issue Verified Mark Certificates, and why buying from an unapproved CA can break your BIMI deployment.

Gmail. Apple Mail. A certificate.

Apple Mail. Certified.

Apple Mail enforces BIMI with Verified Mark Certificates (VMC) on iOS and macOS. Learn the exact requirements, how the 'Digitally Certified' header works, and why Apple's implementation makes VMC non-negotiable for B2C brands.

The supported clients.

A comprehensive comparison of email clients that support BIMI in 2026, including which require a VMC, which accept self-asserted logos, and what this means for your sender strategy.

DMARC. Enforced.

Subdomains. Inherited.

Learn how BIMI record inheritance works across subdomains, when to override per subdomain, how VMC coverage applies, and why DMARC sp= alignment is critical.

Third-party senders. Aligned.

Learn how BIMI works when ESPs like Mailchimp, HubSpot, Salesforce, and SendGrid send email on your behalf. Understand DMARC alignment, DKIM signing requirements, and how to verify your setup.