Nexcess Knowledge Base

The Comodo UserTrust Subscriber Agreement is a binding legal document detailing your rights and obligations as a user of the Comodo UserTrust logo and services.

Learn how to get email header for different email clients with our step-by-step guide. Retrieve useful information about unwanted emails or failed-to-send emails.

What is the DUNS Number meaning? What is a DUNS Number? And the DUNS meaning? What is the DUNS Number definition? All businesspeople should know the answer!

SpamAssassin is an open source application for filtering spam in email and web server applications. It uses heuristics — pattern recognition — to identify spam.

How Nexcess clients in dedicated or cluster environments can configure reverse DNS records from their Nexcess Client Portal.

Learn how Nexcess clients on physical (non-cloud) servers can recreate SSL keys by either using SiteWorx or the command line interface (CLI).

Learn how Nexcess clients on physical (non-cloud) servers can use SiteWorx to install SSL certificates and set up an SSL chain certificate — regarding intermediate and root certificate authorities.

A chain of SSL certificates contains all of the SSL certificates (root, intermediate, and end user) issued by a Certificate Authority (CA) required to verify the subject in the hierarchy of trust.

How content delivery network (CDN) services work and definitions for specific terms commonly associated with CDN.

How to use our website to purchase a non-cloud, shared hosting plan for Magento or WordPress.