About
OpenDNS provides DNS services with security and content-filtering functions. Its consumer options include controls for household internet use, while its site directs business users to Cisco Secure Access for organisational protection. OpenDNS Home offers customisable filtering, while Family Shield comes with adult-content blocking already configured and does not require signup.
The email-related use is limiting access to malicious destinations, including websites reached through phishing links. DNS filtering acts on the domain requests made by a device. It is a different part of the security stack from inspecting message content, running a mailbox or delivering an email campaign.
