Knowledge Base

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

WHOIS Email DCV Deprecation

Understanding Certificate Transparency (CT) Logs and Precertificates

Enterprise Public Key Infrastructure (E-PKI) Manager User guide

This article shows how to digitally sign a PDF document in Adobe Acrobat using a Digital ID, and how to remove a Digital ID when it is no longer needed.

Sectigo customers request a Verified Mark Certificate (VMC) through the Sectigo shopping page and a guided certificate ordering wizard.

This article lists Sectigo's four modern root certificates, explains how they are cross-signed for backward compatibility, and notes the new roots Sectigo is introducing.