Knowledge Base

To display your brand logo in email clients using a Verified Mark Certificate (VMC), your logo must meet strict formatting requirements. Specifically, it must be in Scalable Vector Graphics (.SVG) format and adhere to the SVG Portable/Secure (SVG-P/S) profile.

Learn how to request a Verified Mark Certificate (VMC) easily with this step-by-step guide. Discover the ordering process, account setup, domain validation, trademark and logo requirements, and best practices to ensure smooth certificate issuance.

Learn how to achieve DMARC compliance for Verified Mark Certificates (VMC). This guide explains DMARC, its importance for email security, and step-by-step instructions for configuring SPF, DKIM, and DMARC records.

Learn how to resolve SSL/TLS certificate errors caused by incomplete chains. Understand why intermediate certificates matter, how to verify your chain, and best practices for secure configurations.

Access New Sectigo Public Certificate Chain

This article provides helpful information concerning Sectigo's 4 modern root certificates

This article provides details about Intermediate Certificates, such as; who issues them, who sends them, how to install, and links to download them.

WHOIS Email DCV Deprecation

Troubleshooting Certificate Installation Error - Invalid Public Key Security Object File

64-Character Limitation on Common Name (CN) Field in X.509 Certificates