Nexcess Knowledge Base

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.

Learn about the frequently misunderstood benefits of dedicated IP addresses.

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

Multi-domain SSL certificates — or Subject Alternative Name (SAN) certificates — allows one IP address to serve multiple domains and subdomains, though all of those domains must have the same owner.

How to use SiteWorx to configure email filters to delete or quarantine unwanted email for your Nexcess account.

A self-signed SSL certificate does not use the chain of trust used by other SSL certificates and is often used to perform internal testing without the effort of acquiring a standard SSL certificate.

Extended Validation (EV) SSL Certificates function as the highest class of SSL certificates, activating both the padlock and the legal identity field in most browsers — giving visitors confidence.

Learn how to fix display issues with Internet Mail Access Protocol (IMAP) folders in Microsoft Outlook.

Brazilian domains made simple — get your .COM.BR domain registered in 24 hours or less with OpenSRS.

How to enable and disable automatically generated reply messages for the domain attached to your Nexcess account.