SignumeBlog
Guides on BIMI, VMC & email trust
Practical, accurate guides on getting your logo, and Gmail's checkmark, into the inbox.
BIMI, VMC & CMC: Which Email Providers Show Your Logo (and the Checkmark)?
Not every inbox treats BIMI the same. Here's which providers show your brand logo, which add Gmail's blue checkmark, and which show nothing at all in 2026.
BIMI vs VMC: What Is the Difference?
BIMI is the standard that tells inboxes where to find your logo. A VMC is the certificate that proves the logo is yours. Here is how the two fit together.
Do VMCs Improve Email Deliverability?
A VMC is not a deliverability signal in itself, but getting one usually improves deliverability anyway. Here is the honest explanation of why, and what to expect.
Does an EU or UK Trademark Work for a VMC If You Email Globally?
A common worry: my trademark is only registered in the EU or UK, but I email the whole world. Will my VMC still work everywhere? The short answer is yes. Here's why.
Is a Registered Trademark Required to Get a VMC?
Yes. A VMC requires a registered trademark from an accepted office. Here is what counts, what does not, and what to do if your mark is pending or missing.
Can One VMC Cover Multiple Domains and Subdomains?
One VMC covers one logo, but it can protect several domains and subdomains. Here is how coverage works, and when you genuinely need a second certificate.
What Are the Technical Requirements for a VMC?
SPF, DKIM, DMARC at enforcement, a square SVG Tiny P/S logo, and a BIMI DNS record. Here is every technical prerequisite for a VMC, and where projects stall.
VMC vs Gmail's Blue Checkmark: What Is the Difference?
The VMC is the certificate. The blue checkmark is what Gmail shows because you hold one. Here is how they relate, and why a CMC never earns the checkmark.
What Is a VMC (Verified Mark Certificate) and How Do You Get One?
A Verified Mark Certificate puts your trademarked logo, and Gmail's blue checkmark, in the inbox. Here's what a VMC is, what it requires, and how to get one.
Why Is DMARC Enforcement Mandatory for BIMI and a VMC?
No inbox will show your logo while your domain sits at p=none. Here is why DMARC enforcement is non-negotiable for BIMI, and how to reach it without losing mail.