The higher the big man, the shadow will be longer. On the Internet, the more Internet users often use the services, the more side effects.
E-mail is the most common users of the Internet business, it brings more problems.
Spam, only one of these side effects,
But it is already a lot of people awake at night, cleaning-mail as one of many people.
The anti-spam has started to form a huge industrial chain.
End of the year 1971, the father of David H. Crocker e-mail sent some of his information, which constitute the world's first e-mail. 30 years later, when he came to Beijing room 263 Internet companies, he was shocked, because he did not think his actions that inadvertently have been billions of people are now copying. Today, e-mail has become the Internet often use one of the three operations.
Washed away the worries
Every day, more than 70% of people turn on the computer the first thing to do is look at their e-mail. But what David would have thought that many people are troubled by his invention and depressed.
People find some strange mail unsolicited. After the initial surprise, people began to refuse these headaches can not be removed, in a word, people complaining about their mail more and more "dirty."
IT company in a marketing department, Mr. Zhang served every day by a company from abroad spam, hope he can buy the company's adult items. E-mail also selling insurance to invite you to join a private club. Zhang was very curious how they get their e-mail address. Several months, Mr. Zhang's mailbox has accumulated more than 100 pieces of spam. The worst thing is that once an important message to Mr Cheung misuse as spam deleted. Since then, Mr. Zhang is Henrugusui spam.
He found a friend in the Internet Society to talk their troubles. But a friend told him that now there is no way to inhibit spam. Zhang laments that no one can spam rule it? Who in the bulk manufacture of spam?
NPC deputy Li Linkai announced to the public through the news media of personal mail, he hoped "to open mailbox satisfied public opinion." However, a few days, the first open to the public of the National People's Congress-mail is in trouble - will receive more than 20 daily commercial spam and virus e-mail. Had the same trouble that many people were experiencing.
Related survey, in recent years, China's spam on the rise. Now users receive e-mail spam is filtered through the message carrier slip through the net, but because of the way the diversity of spammers, the number of very large e-mail operators, who can only filter out 50% of them the remaining spam is flowing into the end-user's mailbox.
Our users now average 9.8 per week, send an e-mail, receive regular e-mail 12.6, 19.3 junk e-mail. Accounts received spam mail received 60.5% of the total, is the spammer's technology updates and other causes of the substantial increase in the proportion of spam.
Sources of the world's spam
How many messages can be washed off
The growing threat of spam
Gartner's report, spam makes U.S. companies lost at least 10 billion U.S. dollars annually. The report also pointed out that the International Telecommunication Union: From 2002 to 2004, all e-mail in spam share rose from 25% to 50%. In addition to harassment, spam, Internet users, the company brought back a huge loss. UNCTAD data cited Message Labs said spam to the global business losses caused as much as 20.5 billion.
My company has a mail server in general are spam, some enterprises have to deal with junk mail every year invested hundreds of million of equipment and a lot of manpower, the proliferation of spam has led to serious consequences.
"Spam's governance has clearly transcended national boundaries. Had accused us of spam has been the birthplace of many foreign companies do not say this, because through our research found that the real sender of spam is these foreign companies . "263 Network Communication Co., Ltd. Beijing Health runner-up in the clean-up day on junk e-mail says. Now, the United States is the largest exporter of spam. The United Nations Conference on Trade and Development (UNCTAD) released e-commerce and Development Report 2003 noted that the United States is the world's biggest spammers, junk e-mail users around the world receive more than half from the United States.
As the first person to participate in spam activities, health runner-up that, in terms of political, legal and economic point of view, anti-spam in general has a different meaning. China has become a spam-ridden areas, even in the user receiving the email message, the number of spam messages has been accounted for 60.8% of the total, while at the same time, the mail system has also become an invasion of the international community can not be ignored problem.
Currently filtered through the 263 anti-system, the user received the spam ratio of 17.86%. The amount of spam users receive increases, but the processing time for spam has declined, this is because the users look at the proportion of spam content causes the decline, the user now identify spam and improve their ability a lot of spam is not to be deleted without the user opens, and saves processing time for spam. But this does not mean that we can anti-spam guard.
Ten stain-mail
263 Anti-System Architecture
Compared through Outlook Express, Webmail and other standards issued by e-mail client, we can find ten important characteristics of spam:
鈼?there is no X-Mailer headers, or use a special X-Mailer Letterhead
We can see that Outlook Email sent indicating the letter sent inside the first section of the client: X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0);
The junk mail or not, or have features of a letterhead, for example: X-Mailer: EhooSend ...
鈼?courtesy
More polite spam, will be with more courtesy, such as:
鈼?Please readily removed;
Sorry Excuse me;
Disturb ... ... forgive me ... ....
鈼?forged sender
Inside the Mail From SMTP command and the message body From the inside inconsistent;
From the email is not real in the email.
鈼?Dynamic IP via ADSL, etc. Send
External users with dynamic IP to connect directly to MX servers, and SMTP services not provided locally (can not telnet 25 port), IP can not reverse interpretation.
鈼?Send tool signature
Some shared bulk tool will send a letter inside each have their own signature.
鈼?do not use the standard MIME format
E-mail format is not standard, but can also be compatible with Outlook Express.
鈼?send more than the current time
Some spam e-mail client in order to maintain a rank in the first place, will send the time to force changes to a lead time, such as January 1, 2005.
鈼?After a lot of servers forwarding
In the letter head has more than 3 Recived:
鈼?body content of the letter with a special HTML tag
In order to embed more content and script, spam often use some general messages will not use the HTML tag, such as iframe, frameset, object, etc..
鈼?letter with unsubscribe or not to accept the description of such messages.
Prevent Nishajuxia
263 President Lu Bing frankly anti-spam is a systematic, require the efforts of all aspects of society.
He told reporters that 263 anti-spam resources in each of the input more than 10 million yuan. Also in 2004 to undertake a national 863 program only anti-spam project on "multi-feature intelligent anti-spam systems and standards for Research and Implementation", the project has also passed the national acceptance.
35 Internet Technology Co., Ltd. CEO Gong Shaohui considered to be three-pronged anti-spam work together: one is the use of technical means operators to filter spam and viruses, through the appropriate clause will mail the customer behavior. The other associations advocating self-discipline, to strengthen international cooperation to clean up the market; In addition, laws and regulations through the introduction of controls for malpractice. Ministry of Information Industry of the "way" is the perfect anti-spam laws and regulations of the flag, so that the users be able to lodge complaints, on the management of spam has no intention of great significance.
As e-mail huge profits, particularly in business mail market, the re-emergence of charges, many manufacturers began to focus on business mail market, it would be to carve slice of the pie. However, service providers, e-mail is not an easy business to eat fat mouth. In the e-mail has become an indispensable tool for business contact and communication era, such as spam, e-mail leaks and other issues have become an obstacle to further commercial e-mail problem.
To do this, 263 are actively promoting the development of related standards, and would like to introduce relevant laws and regulations relevant state departments, as paving the way for the healthy development of e-mail.
February 20 this year, long-brewing to the "Internet E-mail Services" to Ministry of Information Industry Order No. 38 published in the form and will be implemented on March 30. Entitled "The People's Republic of China Telecommunications Regulations," and "Internet Information Services" as the basis to formulate the final bill in a more standardized model to the management of e-mail put on the Desktop.
"Internet e-mail service management approach" not only makes the status of e-mail communications secret up to a high degree of law, while access to e-mail service provider defines the qualifications: the ability of anti-spam, e-mail system on the development of technical standards capacity, as well as mail security management approach has become part of most concern.
Government Related Acts, to some extent a matter of fact means that the threshold increase access e-mail service, mail service operations related to the issuance of the license will become a large service providers will be most concerned about the topic.
Experts speculate: 263 has just passed the 863 anti-spam research projects acceptance, as the only message involved in the project operator, the company is likely to be the first to get corporate mail service operation license.
Threshold will increase a lot like gold in the e-mail market, companies get in the door. However, one purpose, to block e-mail generated by the source, to prevent e-mail Nishajuxia, pollution users mailbox.
Cleaning Formula
E-mail gateway technology works:
Provide a variety of ways of spam filtering, mail server as spam to avoid the transfer station. Spam filtering: 4 layers of spam protection.
The first layer: Network layer IP blocking and dynamic blacklist
In the network layer, the message gateway can be set to mask any of the IP, a network segment; also can shield any of the sender, a domain. Dynamic blacklist by the black hole technology, real-time access to anti-spam list.
Second layer: SMTP protocol conversation format checking, DNS reverse resolution
The third layer: Dynamic White List
Accumulated to a certain number, the system automatically add the sender to join the white list.
Fourth layer: content filtering based on Bayes Algorithm
Through the built-in Bayesian (Bayes) library into the mail system on each message in the head and body analysis, obtained threshold, threshold lower than 5, compared with the normal e-mail; if more than 5 e-mail gateway judged to be spam, will increase the SPAM *** in the subject words; if the threshold more than 7, the system will automatically go home spam; threshold than 9, the system will be automatically deleted.
The subject marked with SPAM mail client software, users can set the filtering rules or webmail dump a folder, regular inspection, deleted after confirmation.
(1) security design.
E-mail system kernel using qmail, qmail sendmail is to address security issues designed. Qmail core of five processes, each running their own non-root privileges, even if one of the destruction process, the process still does not affect other services. In addition the system completely separate account and e-mail account, mail account to the database is stored, to a certain extent, to eliminate the possibility of internal attack.
(2) mail design.
Letter certified mail system supports (smtp-auth), blacklist and system-level spam filtering. Users can always access from the domestic and international anti-spam blacklist list file organizations, into the mail system. So that e-mail administrators from passive to active. E-mail system to support fuzzy matching blacklist feature, you can shield a field such as @ usa.com, can only shield a user domain, such as spam@usa.com.
Super anti-spam system works
Cleaning standards
Junk mail (SPAM), also known as UCE (Unsolicited Commercial Email, unauthorized commercial e-mail) or UBE (Unsolicited Bulk Email, a large number of unauthorized e-mail). Internet Society of China to the spam gives a formal definition, as long as they meet one of the following four can be called spam e-mail:
(1) the recipient had failed to request or agree to receive ads, electronic publications, promotional materials such as various forms of promotional e-mail.
(2) the recipient can not reject the e-mail.
(3) hide the sender identity, address, title and other information e-mail.
(4) containing false source of information, the sender, routing information such as e-mail.
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