What is a spam filter?

Spam filter is a software program that sorts incoming mail to identify and pull unhealthy mail, also known as spam . It can be installed on an internet postal server, a private network server or on a personal computer. SPAM is not only annoying, but can be used to spread harmful code such as viruses and trojan horses, and to maintain phishing fraud. For these reasons and others, the spam filter is a great way to help protect your computer or network and cut out unhealthy mail.

To detect spam, the filter compares the parameters in the incoming post office with lists of configurable rules. For example, it can be set to check the subject Incoming mail title for terms associated with pornography, medicines and other common spam products. The sender field can also be filtered for IP addresses associated with spammers or traders. SPAM will often include harmless or even personal headings like "Hi!"Or "As for your question", it makes it difficult to tell the General ISP filter to spam from the legitimate e -mail. Therefore, some SPAM is still being handed over from internet postal servers to connected private networks and end users.

For this reason, many network administrators install an office or company network, as well as end users at home. In these cases, the filter can be highly configured to capture unhealthy mail, which is generally configured on online programs. Like other software programs, spam filters are not all the same. Currently, the most popular program is a "intelligent" program based on statistical methodology Bayesian . It compares incoming mail with a set of user -defined rules and then identifies SPAM based on mathematical probabilities.

in the simplest confiigiration, spam filter passes the junk afterstinging to the spam folder and legitimate mail to the mailing mail. The user can check the tasks and fix the errors. The program will remember repairs and avoid these mistakes in the future. In other words, the Bayesian program is "taught" what to look for and "learns" from his mistakes. It wasn't long before the filter made a few errors and can work virtually without a user. One popular free spam filter boasts an almost perfect record after the initial "training" period.

A good filter also uses a "white list" to ensure protection against phishing scheme. For example, people who carry out online banking can enter the right address of the bank's website in the white list. The spam filter checks the incoming mail for incorrect or similarly written addresses and refuses them as attempts at phishing.

There are several spam programs available online, most with a 30 -day free trial period.