End Of Tiresome Interruptions

ExchangeDefender helps you get back to business, ending tiresome interruptions by relying on:

Bayesian filtering analyses text patterns of known SPAM messages..
Internal honeypot network with over 5,000 email addresses collecting SPAM..
Third party RBL (blacklists) help identify dangerous networks and senders..
SPF/SenderID/DomainKeys frameworks help establish trusted relationships..
Distributed Checksum Clearing Houses help idenitify bulk mail pieces..
Internal RBLs, IP reputation lists, network checks establish sender reputation..

Truly, the combination of experience, high volume of mail processing, commercial grade subscriptions and constant monitoring and development deliver the most reliable flow of mail you actually want to read.

Comprehensive Mail Analytics

There is no single software or a single process that can successfully eliminate a significant amount of SPAM on its own. As SPAM and online threats evolve the gradual mail analytics become more important and the efficient implementation of those processes is critical. To offer you an example: as we learn about more SPAM tactics and patterns we perform more checks against the sender, recipient, email, attachments, context, filenames, text patterns - and as the size of those checks the delay to the message delivery due to processing can become significant. ExchangeDefender employs a comprehensive mail analytic check which runs thousands of message comparisons simultaneously, reducing average message processing time to a fraction of a second.

Message processing development is critical to effectively stopping SPAM, something that is impossible to accomplish with appliances and server-installed solutions. ExchangeDefender processes millions of messages each hour and learns from the mail flow patterns in real-time, something that appliance makers and server-software publishers usually lag days or weeks behind. The future of SPAM protection is on identifying treats in realtime and ExchangeDefender is designed from the ground up to take advantage of it.

Proactive Mail Identification Systems

ExchangeDefender, through proprietary technology, can predict the type of a message it is about to receive by analysing only the SMTP conversation and the IP reputation of the sending host. For example, if the sending server does not even wait for the welcome banner to start the SMTP conversation it is obvious that the message will be SPAM. Furthermore, after the same server has been the origin of 10,000 SPAM messages over the past hour it is pretty clear that the next message will also likely be SPAM. ExchangeDefender will not automatically drop these messages but every piece of the SPAM criteria can lead to a score that qualifies it as junk.

ExchangeDefender performs hundreds of checks before the SMTP connection is even established. Doing so helps reduce the amount of mail you have to review for potential junk content.

Reliance On RFC And Established Standards

ExchangeDefender is proud to be 100% based on established RFC standards. RFC standard compliance is very important to the timely and reliable delivery of legitimate mail. We do not use any greylisting technology, we do not enforce extensive delays between SMTP commands and we do not use any "tricks.

Reliance on established standards is crucial to timely delivery and ability to effectively troubleshoot mail flow issues with remote servers.

Quarantined Messages, Not Rejected Or Delayed Messages

ExchangeDefender is one of the few providers that quarantine junk mail instead of rejecting it outright. This is valuable for a number of reasons, primarily because it never takes the control out of your hands. Furthermore, quarantined mail can always be read on demand and released by the user if it is indeed legitimate, saving the time that would otherwise have to involve system administrator and a remote sender resending the message.

ExchangeDefender does not use any message delaying technology. While we understand the potential benefits behind greylisting they are absolutely unacceptable in a business environment where timely delivery is important. Furthermore, with more and more misconfigured and overloaded mail servers it is in our customers interest to accept mail as fast as posssible and process it further internally. With our processes you can expect the messages to reach you in the fastest way possible.

Protection From DDoS, Slamming, Botnet Attacks

Because ExchangeDefender accepts network connections on your behalf, we are the ones taking on the network attacks from hackers and botnets. We have a very redundant infrastructure with a ton of bandwidth and can withstand a large-scale DDoS because of the number of systems that accept inbound mail, something that is impossible to do with a single appliance or a single server-based firewall.

Furthermore, our networks are in constant sync and can detect the botnet membership by the type of behavior and content being sent over time from the remote systems. Because we have so many points of entry we have a larger sample size and more acurate way to deny connections to known botnets.

Finally, spammers live and die on their reputation. ExchangeDefender, due to its size, knows how many messages it receives from smaller mail servers or even servers on cable & DSL networks many of which are residential. So when a server goes from sending a few dozen messages to a few thousand messages a day we can stop them in their tracks.

Adaptive System Advantages

The key to effectively eliminating SPAM and unwanted content is being adaptive to the mail flow - as it happens. One of the most important features of ExchangeDefender is its ability to adapt to the changing mail flows, hour to hour, minute to minute, second to second. It is estimated that over 25% of the hosts on the Internet are a part of a botnet or have been compromised in some way. Adapting to those trends and filteing out messages based on topology maps is crucial to eliminating messages because RBLs, honeypot traps and SPAM rules do not work against 0-day SPAM or other threats that are just temporary but still impact your organizations productivity.

ExchangeDefender can scale and respond in realtime as well as adapt to the emerging threats long before they reach your inbox.