Nowadays, spam is more than just an irritating flood unwanted email. It is also a means by which spammers can transmit viruses, spyware and adware to your computer. An anti-spam filter is essential to minimizing this potential risk. It will also stem the flow of spam into your inbox.

What is an anti-spam filter?

An anti-spam filter is a program designed to detect and block unsolicited bulk email. It works by scanning any incoming email for words, phrases, html code and other spammer tactics to determine whether an email is spam or not. It does this based on probability formulas that calculate the likelihood that an email that has certain words is spam.

It will also create black lists and white lists. The blacklist will store email from unknown ISP and email addresses or ISP addresses; the whitelist will hold email that is sent from pre-approved sources. The filter software will also keep these lists up to date. Whenever the filter detects that an incoming email is spam, its address is added to the blacklist. Whenever the sender or recipient confirms an email as trusted and legitimate, it will be added to the white list. Most of the “sporm” (spam pornography) will be filtered out as well as any email that it detects has adult content.

What Should You Look for in Anti-spam Filter Software?

Here are other important features you should take into consideration:

- Make sure the anti-spam filter software is compatible with your particular email service. Do not take it for granted that it will work with what you have.

- It is important that the software program is easy for you to use and navigate. Anti-spam software is worthless if you can’t figure out how to use it or if it has features you do not understand.

- The features and tools the software offers should enable you to customize the program to suit your own needs. It should be flexible in letting you set your own rules regarding which email to permit into your inbox and what you want to filter out or block.

- Ideally, it should enable you to set up whitelist, which will indicate particular email and ISP addresses that should always be delivered to the inbox. This will ensure that legitimate email from trusted sources will never be filtered out or accidentally deleted.

- The software should install with ease, with zero or minimal errors encountered during set up. Some anti-spam software requires registration, additional downloads or other steps to be taken before it can be used.

- The software you choose should be stable in its release and workings. One way to check this is to look at the release package and view what the programmers or company states is the last stable release. It is probably not in your interests to buy software that is still in the beta phase, particularly if you are not familiar with the program.

Spam is irritating at best, and maliciously destructive at worst. Buying the right anti-spam software will go a long way toward protecting you from the spammers of the world.

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Anyone who has an email address needs no introduction to this pesky phenomenon of electronic communication. Spam is unwanted, unsolicited commercial email that is mailed in bulk to thousands, even millions of recipients simultaneously.

Much of the confusion regarding spam comes from a lack of understanding the everyday email user may have regarding the ways and motivations of the spammers.

Whether a given email is spam or not spam can be said to be in the eye of the beholder. There are legitimate email marketers out there, who comply with all applicable laws when they do their bulk emailing. They will, for example, only send their advertising to recipients who have subscribed to their emailing list. In fact, in formal studies have shown that currently, only about half of all spam is deceptive or fraudulent; roughly half of all spam contains genuine marketing messages. Thanks to spammers, all email marketing is tainted with a bad name.

The nature of spam has less to do with its commercial content than with the fact that it is unsolicited and sent out in bulk. There are two categories of spam: unsolicited bulk email and unsolicited commercial email.

Unsolicited bulk email is mass-mailed to recipients who have not given their consent to receive it. This category of spam encompasses jokes, chain letters, virus alerts, etc. unsolicited commercial email targets your wallet. This subset of spam includes get-rich- quick and pyramid schemes, stock offerings for pennystocks, spamming software and fake pharmaceuticals.

While most spam is generally mailed out to advertise a product or service, some is malicious in content and intent. It runs the gamut from jokes and ads, to stock-market scams and virus-laden emails. Spammers, those obnoxious folks who send you spam, will target you because:

- They want you to buy something

- They defraud you out of your hard-earned money

- They want to confirm that your email address is a real live one (and then add you to a spam mailing list)

- They just want to shock and offend

The huge volume of spam has created big problems. While it is free for the spammer to send out his millions of spam emails, the cost of the bandwidth that this junk mail takes up borne by the internet service provider (ISP). The ISP, not one to bear this expensive burden on its own, will pass on some of the cost to you in the form of price increases.
You also pay the price for spam in the time wasted sorting through and deleting junk mail, the loss in productivity and the pure aggravation of having to deal with it. It also raises security issues because it may contain viruses that are harmful to your computer.

How do you spot spam when it lands in your inbox?

Here are a few things you can look for that are a dead give-away

- Email from someone you do not know
- Nonsensical subject lines
- Outlandish promises of money, exotic cruises and lonely housewives
- Adult or pornographic content
- Unsubscribe links in unsolicited email
- Very brief emails – a line or two

You should be aware that spammers often send you email that is designed to look like it came from an acquaintance of yours, a reputable company or a reply to an email from you.

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Spam has become an ever-increasing problem in recent years, costing legitimate businesses a great deal in both time and money.

In response to the growing threat from spam, new legislation was enacted in 2003. it was called: Controlling the Assault of Non Solicited Pornography and Marketing Act (CAN-SPAM act). This act created some requirements for all companies who are sending bulk commercial email, as well as those companies whose products are offered for sale in the spam emails. It also instituted penalties for violators, as well as giving the client or consumer the right and the means to request that the emailers cease the spam efforts.

CAN-SPAM was enacted in January, 2004. The act covers any email which have as its purpose advertising or promotional efforts for any service or product, including those whose contents reside solely on a web site.

The legislation also covers “transactional or relationship messages,” meaning those emails which help a web site to deal with any transaction, even those which are agreed on, or make updates to any customer whether new or exisiting. None of these may contain false or spoofed routing information.

The Federal Trade Commission (FTC), the United States agency for consumer protection, was granted the authority to enforce the act and the DOJ, or Department of Justice is additionally charged with the enforcement of the CAN SPAM act. It also provides that Internet Service Providers who are hurt by the spam may in fact sue the violators of the legislation to recoup losses to their own business.

Other Major Provisions of the Law

-It bans any attempt to falsify the information in the header or subject line.

These must correctly identify what the message is about, and accurately display routing information as well as “To” and “from” information. The email must accurately indicate the identity of the sender and recipient. It must accurately portray the domain from which the email originates as well as the senders real email address.

- It bans misleading subject lines

The subject line must not mislead the recipient to open the email under false pretenses. It should clearly indicate the actual subject matter of the email.

- Emails sent in this fashion must offer the recipient a legitimate means to get out of receiving the commercial email in the future. Any such requests to opt-out must be honored by the spamming company, and the email address deleted from its sending list. The commercial emailer will have 10 days to after the request to cease sending messages to that address

- Commercial bulk email should easily be identified as an advertisement or solicitation. It must also include the sender’s actual physical postal address

- The recipient must be fore-warned of any sexually explicit information the email may contain. This warning must be displayed in the email’s subject line.

Each and every violation of this law or the aspects of the law subjects the sender to strict fines that can go as high as $10,000 per incident and, for certain violations, the commercial emailer will face possible jail time.

Another legal initiative aimed at fighting spam is the “Digital PhishNet” (DPN), which was established in 2004. It is a collaborative effort between the Internet industry and criminal law enforcement. Its purpose is to identify and to prosecute spammers who break the law through phishing. Online auction sites, financial institutions, ISPs and other groups within the industry are all involved in this imitative. Important data and information is forwarded in real time to law enforcement.

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