AntiSpam Guide
Two Main Groups Of Spam!
from: Camry James
There are two main types of spam, and they have different effects on Internet users. Cancellable Usenet spam is a single message sent to 20 or more Usenet newsgroups. (Through long experience, Usenet users have found that any message posted to so many newsgroups is often not relevant to most or all of them.) Usenet spam is aimed at lurkers, people who read newsgroups but rarely or never post and give their address away. Usenet spam robs users of the utility of the newsgroups by overwhelming them with a barrage of advertising or other irrelevant posts. Furthermore, Usenet spam subverts the ability of system administrators and owners to manage the topics they accept on their systems.
I think it's possible to stop spam, and that content-based filters are the way to do it. The Achilles heel of the spammers is their message. They can circumvent any other barrier you set up. They have so far, at least. But they have to deliver their message, whatever it is. If we can write software that recognizes their messages, there is no way they can get around that. Email spam targets individual users with direct mail messages. Email spam lists are often created by scanning Usenet postings, stealing Internet mailing lists, or searching the Web for addresses. Email spams typically cost users money out-of-pocket to receive. Many people - anyone with measured phone service - read or receive their mail while the meter is running, so to speak. Spam costs them additional money. On top of that, it costs money for ISPs and online services to transmit spam, and these costs are transmitted directly to subscribers.
The statistical approach is not usually the first one people try when they write spam filters. Most hackers' first instinct is to try to write software that recognizes individual properties of spam. You look at spams and you think, the gall of these guys to try sending me mail that begins Dear Friend or has a subject line that's all uppercase and ends in eight exclamation points. I can filter out that stuff with about one line of code.
But the real advantage of the Bayesian approach, of course, is that you know what you're measuring. Feature-recognizing filters like SpamAssassin assign a spam score to email. The Bayesian approach assigns an actual probability. The problem with a score is that no one knows what it means. The user doesn't know what it means, but worse still, neither does the developer of the filter. How many points should an email get for having the word sex in it? A probability can of course be mistaken, but there is little ambiguity about what it means, or how evidence should be combined to calculate it. Based on my corpus, sex indicates a .97 probability of the containing email being a spam, whereas sexy indicates .99 probability. And Bayes' Rule, equally unambiguous, says that an email containing both words would, in the (unlikely) absence of any other evidence, have a 99.97% chance of being a spam.
About the author:
Find out How Spam Blocker can save you Money at http://SpamBlocker.eask.info< /a>
For permanent link to this article click here.
Related story:
Bypass your School and Work Filters with an Anonymous Proxy Server:
from: Steve AveryWith the proliferation of the Internet, many websites promote themselves by sending you spam junk mails, advertisings and even embed spyware that is difficult to remove onto your computer. These things not only keep track of your personal information, but also enable hackers and crackers to infiltrate your system. Anonymous proxy servers act as a wall between your data and the Internet, whereby providing security to your system and data. There are however, other reasons to use an anonymous proxy server.
If your work or school has any type of filtering in place to prevent people from visiting certain websites, an anonymous proxy server is a great way to get around such restrictions. Anonymous proxy servers work by acting as a "middle man"; they download the requested ...
To read the rest of this story click here.
Filter Microsoft Outlook Spam News
Review: Cloudmark Desktop - The Tech Herald
 The Tech Herald | Review: Cloudmark Desktop The Tech Herald, IN - So what makes Cloudmark better than SPAMfighter, or any other Spam filter for that matter? The answer is user preference and near zero false positive. ... |
How do I use Windows Live Mail client? - Infos Jeunes France
How do I use Windows Live Mail client? Infos Jeunes France, France - ... automated junk email filter that scans all incoming messages to protect you from spam and phishing attacks. Microsoft urges all users of Outlook Express ... |
谢绝第三方邮件转发 - 新浪网
谢绝第三方邮件转发 新浪网, China - 一种是使用Anti-relay Filter，另一种是Anti-relay Plug-In。后者的功能更强大些，但只支持4.x 版本;如果使用的是3.5版本，则需要使用前一种方法。 ... |