The infrastructure that Sophos uses to submit real-time, DNS-based queries to SophosLabs regarding IP addresses, URIs within messages, and image fingerprints. Queries are triggered when the anti-spam engine has been unable to determine if a message is spam. These real-time lookups are enabled by default and provide minimal latency between the time that Sophos makes new anti-spam data available and when it is available for use by the anti-spam engine.