SYSTEMSLOGIX offers AntiSpam. (continued)

Introduction to AntiSpam

AntiSpam offers a more aggressive method to counter the continuing junk e-mail problem. It is an anti-spam system, which is designed to shift the filtering workload from the recipient to the spammer (or the legitimate sender). The fundamental idea is that spammers will not take the time to confirm that they want to send you e-mail, but a legitimate sender will. The system maintains two lists of addresses: a "blacklist" of senders that will always be blocked, and a "whitelist" of senders that will never be blocked. If someone sends you e-mail from an address not listed in either list or they don't violate all 5 criterion of spam (using the latest SpamAssassin technology), they will receive a verification e-mail (and their message will be queued temporarily). Many messages from the same sender will only result in one verification e-mail sent out to that address. A verification e-mail is an immediate reply message using a random dictionary word that the sender must replace the subject line and reply with. If they give the correct "response" to the verification e-mail, they are added to your white list and their queued message(s) get forwarded to your inbox.

Attachments and Content

Spammers have turned to virus writers to create email relay viruses meant to open attachments that are infected with this type of virus. This could allow a spammer to send spam to thousands of people through your home or business without your knowledge. We solved this problem by allowing the administrator the ability to define what attachments are acceptable. AntiSpam offers administrator configurable blocking of attached files. It also allows the blocking of content by keywords, configurable through a web-based administration tool.

Filtering Only Method

Filtering is a method that detects then deletes messages based on origin or Subject line and body text, or by known spamming techniques. It is our experience that this antispam technique will not totally eliminate spam and works best for spammers. The spammer is smarter than the filter. The reason? The amount of junk Email is growing and always changing. Spam is forged, making it impossible to determine the source. Spammers use a multitude of software that modify things like the subject line and body with every message, or disguising spam to look like someone you might know.

Filtering alone has one major flaw; the filter is always playing catch up with the spammers. By the time you train your filters to recognize new types of junk Email, the spammers are already developing the next type that will get through.

Verification Response Method

Recent articles regarding verification type response system requiring the sender to validate themselves pose some interesting thoughts. One article stated that this type of system would cause twice the traffic and help the spammers by validating Emails.

Our option to integrate with Spam Assassin and optional dns blocking drastically reduces the outbound traffic. If the Email is pre-determined that it is spam the request never goes out. The only way the spammers can get Email to you with a response type system is to actually supply a real return Email address or hire thousands of people to reply to all the confirmation Email thus giving you the means of pressing charges after you request they stop.

Even if they did hire thousands of people to reply, the amount of junk Email would still be drastically reduced. A human will never work as fast as the Email robot programs out there.

Manual Method

Manual mode allows a user to turn off Automatic Verification Responses from being sent, thus allowing the AntiSpam user to select which address are requested to verify or give the user an easy way to build a white list without requiring already known users to verify who they are.

Proxy Mode

This option when configured by the administrator allows AntiSpam to act as a proxy to an existing mail server such as Microsoft Exchange Server.

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