Thinking on the selection of anti-spam gateway

Internet applications make more and more enterprises and organizations rely on IT systems to an unprecedented degree, and mail server system as the most mature, most commonly used one of the applications, has become the most important tool for people communication and office. And the increasingly rampant spam has a huge impact on the business, people have lost their patience on spam, and set about taking various measures to deal with it.

A common anti-spam solution is to use a professional anti-spam gateway. This kind of products are professional, efficient, can be in the mail server before the relevant "determination, disposal", can effectively prevent spam, virus mail harm. For enterprise users, the general use of such professional anti-spam gateway, and how to choose an excellent anti-spam gateway system for the enterprise is also a serious challenge.

It is generally considered from the following points:

★ Technology Layer--intelligent anti-waste technology

Intelligent anti-spam technology is simply the anti-spam technology of comprehensive content filtering and behavior analysis. Generally using this kind of technology products, all need to have a strong process of processing platform technology. Process processing, but also in recent years in the field of anti-spam is a very advanced technology. Through the intelligent process processing mechanism, all kinds of anti-spam technology, according to the order, orderly, focused on the standard of the mail inspection, content inspection and routing disposal, the current implementation of such functional technology in the mail gateway only turbogate Mail gateway system.

Turbogate Mail Gateway anti-spam Technology

First layer: Network control layer

The Turbgate mail gateway automatically lists the IP (SPAMIP) that sends the spam message as a spam IP list. The obvious denial of sending spam SMTP connections through the SMTP service layer greatly reduces the burden on the background delivery system and the anti-spam engine.

Second tier: source analysis

According to the location of spammers IP, check the result with APNIC's IP information base to see if the source is true, if true, it may be suspicious mail. This anti-spam strategy is more effective because the IP source cannot be disguised.

Third Floor: blacklist

Through the blacklist, turbogate Mail Gateway can be set to screen any one IP, a network segment, can also screen any sender, a domain.

Fourth Floor: Grey list

The basic assumption of the grey list technology is that viruses and spam are usually one-time and will not be retried if an error is encountered.

Fifth Floor: Trend analysis

The Turbogate Mail gateway determines whether a message is spam by analyzing the content of the phone, email, or web link in the message, and judging by the match.

Sixth floor: The source of the message to judge

Mainly through the analysis of the source of the message, such as: Sender IP, sender, sender domain, etc., to determine the possible line of spam messages.

Layer Seventh: Spamfilter Content Filter

Turbogate Mail Gateway through the analysis of the message content keyword, can be satisfied with the results of the content analysis of the message of the corresponding spam score, while collecting customer feedback spam features sorted into the rules of the content, regularly notify the customer update.

Layer Eighth: Thematic analysis

Turbogate Mail Gateway Theme Analysis principle is based on: the same type of spam messages are similar to the content, through the similarity analysis to determine whether spam, through the same type of spam statistics analysis, can be summed up the main keywords of such spam, through the keyword matching degree, Confirm that it is junk e-mail.

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