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.

These instructions will show you how to generate a certificate signing request (CSR) and install a certificate in Microsoft Azure Key Vault. You will need to create a Key Vault in your Azure account before using this how-to.

Access New Sectigo Public Certificate Chain

Learn the steps to generate a Certificate Signing Request (CSR) for an S/MIME certificate using Keychain Access on macOS. This CSR is required to request a digital certificate for secure email communication.

WHOIS Email DCV Deprecation

Guide to generating CSR on Apache Server

Troubleshooting Certificate Installation Error - Invalid Public Key Security Object File

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