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IronPort Reputation Filters

A flexible response to suspicious senders keeps hostile traffic off your network.

IronPort Reputation Filters™ provide the outer layer of spam protection to our email infrastructure. As the first line of defense on the IronPort email security appliances, Reputation Filters dispose of up to 80% of incoming spam at the connection level – saving bandwidth, conserving system resources and yielding the highest levels of security for critical messaging systems. A proven preventive solution, IronPort Reputation Filters defend the largest ISP and enterprise networks, as well as small and medium-sized businesses, in production environments around the world.

Over 100,000 organizations participate in the SenderBase Network,
enabling the world's largest email traffic monitoring system.

Features

Accurate Reputation Scores

IronPort's SenderBase® Network is the world's first and largest email and web traffic monitoring system. SenderBase collects data from more than 100,000 networks around the world, 10x more than competing reputation monitoring systems. By tracking a broad set of over 110 attributes from more than 30% of the world's email, SenderBase supports very accurate conclusions about a given sender. More

Sophisticated security modeling leverages the breadth of SenderBase data to generate a granular reputation score ranging from -10 (for the worst senders) to +10 (for the very best).

Dynamic Protection

IronPort email security filters automatically apply mail flow policies to senders based on their reputation score. As the filters receives inbound mail, a threat assessment of the sender is performed. This assessment returns a granular reputation score, which is linked to specified mail flow policies.

"True" rate limiting based on sender reputation provides a unique and intelligent way of dealing with spammers that occupy the gray zone, where it's not clear if they are friend or foe. The IronPort system can limit recipients per hour accepted. Since Reputation Filters respond to these gray zone mailers by this "true" rate limiting, but not actually blocking, the false positive rate is extremely low – less than one in one million.

Comprehensive Management

Automatic updates ensure scores are dynamically updated based on the latest data from SenderBase. This eliminates the need for any ongoing management of Reputation Filters.

Benefits

Improved Catch-Rate IronPort Reputation Filters block up to 80% of incoming spam at the edge of your network, improving the overall efficacy of your anti-spam solution.

No Administrator Maintenance Required IronPort Reputation Filters adjust scores automatically as SenderBase pulls in new data.

Reduced False-Positives IronPort Reputation Filters intelligently combine many different metrics before determining a sender's reputation. Confirmation of suspicious traffic patterns across many data types and sources will result in a poor reputation. This unique ability to triangulate information across SenderBase makes Reputation Filters the undisputed leader in reputation accuracy.

Lower Hardware Costs and Increased Message Throughput Eliminating spam and unwanted mail, before resource-intensive content filtering, will improve overall system performance and reduce the amount of supporting hardware required for the rest of the email infrastructure. Typical customer results show that downstream load is reduced by three to five times through use of IronPort Reputation Filters.

Reduced Risk From Denial of Service or Dictionary Harvest Attacks IronPort Reputation Filters score senders in real time and are adept at preventing damage from many types of distributed attacks. Attacks arising from zombie networks, which can bring content-based anti-spam systems to a grinding halt, can be gracefully managed with Reputation Filters.