Blog & Insights

Email Authentication Guides & Resources

Expert insights on Verified Mark Certificates (VMC), Common Mark Certificates (CMC), BIMI and email security.
Practical strategies to protect your brand identity in every inbox.

Recognized Trademark Offices for VMC Certificates

The DigiCert and GlobalSign trademark-office baseline for VMC validation, how Madrid/WIPO registrations are evaluated, and what to confirm directly with your issuing CA — including Sectigo — before applying.