Relying on a single filter can significantly reduce the capture rates while at the same time increase the number of false-positives. Even using multiple filters can result in an unacceptable number of false-positives.

The key to our industry-leading 98% capture rate is the blend of proven analytical processes, which work in partnership to determine the classification of messages. To virtually eliminate false-positives, the Email Security Service requires that at least two of the techniques agree that a message is spam before considering a message junk.

Each message that passes through the the system is scored based on the sender's reputation, content analysis, and network analysis.

• Sender Reputation - Messages are checked against a database of known good senders and bad senders to establish a reputation score.
• Content Analysis - Naive Bayesian analysis, found in many anti-spam solutions, is easily fooled by common spam techniques such as inserting random gibberish and special characters throughout a message. To counter these techniques, we use a highly sophisticated form of Bayesian analysis, which accurately detects and scores strings of nonsense.
• Network Analysis - The service compares each message against a collaborative database composed of submissions from a network of over one million users. The collaborative database contains both known spam messages and genuine messages – dramatically increasing the spam capture rate while decreasing false-positives. The network analysis process allows us to quickly react to new spam trends.

Personal Spam Management
No matter how simple or complex the needs of your organization, our solution is easily adaptable to meet your requirements. Your email security can be tailored and administered right down to the individual user.

To reduce the burden on your IT staff, the personal administration console allows users to set personal preferences, while administrators reserve the right to set organizational level rules. Users can quickly and easily:

• View their personal quarantine
• Maintain personal white and blacklists
• Set individual capture sensitivities
• Remove items from their quarantine

For more information on user capabilities, visit the user page.

The Kitchen Sink Approach to Anti-Spam
No matter the specific needs of your organization, the granularity of the Deerfield Email Security Service provides capabilities to exceed your expectations. Couple that with minimal administration and you have the most cost effective email security solution available.