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.

S/MIME (Secure/Multipurpose Internet Mail Extensions) is a widely adopted protocol for securing email communication through encryption and digital signatures. Gmail supports S/MIME for Google Workspace accounts, allowing users to send encrypted emails that ensure confidentiality, integrity, and authenticity.

Learn how to change certificate trust settings in Keychain Access on macOS. This step-by-step guide helps IT admins and advanced users manage trust preferences to resolve secure connection issues safely.

Learn how to securely sign PDF documents in Bluebeam Revu with a step-by-step guide. Includes prerequisites, digital ID setup, signature field creation, and authentication for compliance and document integrity.

Learn how to securely sign Microsoft Word documents using a digital signature and a document signing certificate. This step-by-step guide ensures authenticity, accountability, and integrity for official or sensitive files.

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.

Learn why public SSL certificates cannot be issued for internal IP addresses or hostnames and explore secure alternatives like private CAs and Sectigo Private PKI solutions for internal systems.

Learn the step-by-step process to add a digital signature to a PDF using Adobe Acrobat Reader DC. Includes instructions for selecting your certificate and signing securely.