Monday, September 2, 2013

Protecting from Spam

Spam is flooding the Internet with many copies of the same message, in an attempt to force the message on people who would not otherwise choose to receive it. Most spam is commercial advertising, often for dubious products or get-rich-quick schemes. Spam costs the sender very little to send most of the
costs are paid for by the recipient or the carriers rather than by the sender.

Never respond to spam
Most of spammers say in their mail to unsubscribe click here but they’re lying. What they really want to do is confirm that they’ve got a live address. Also, if the user respond, they’ll sell their addresses to every other spammer meaning user soon be flooded with even more spam.

User should not post his address on his website
It seems like a good idea at the time, but posting an email address on a personal home page is just an invitation to spammers. Spammers and the people who sell spamming as a business have software that "harvests" email addresses from the Net. This software crawls through the Internet seeking text strings that
are username@domainname. When it finds one, it catalogs it on a database of other email addresses to be used to send spam. It is recommended that instead of giving e-mail in text form at the website, user should give an image of it.

Use a second email address in newsgroups
Newsgroups are the great email address gathering ground for spammers. If someone posts to a group, he is going to get spam it is just a matter of time. So how is he supposed to participate? Use a different email address for talking to friends and relatives. In other words, have a public address and a private address.
One has to deal with spam only on his public address.

Use a spam filter
While there is no such thing as a perfect filter, anti-spam software can help keep spam at manageable level. Some of it is cumbersome, some works better than others, some even requires that the user let his email messages go through another system for storage and cleaning.

Never buy anything advertised in spam
The reason that people spam is because they can make money. They make money, like all advertisers, by convincing people to buy a product. If no one buys the things advertised in spam, companies will quit paying spammers to advertise their products.

Disable scripting features in e-mail programs when possible
Since e-mail programs frequently use the same code as web browsers to display HTML formatted messages, the vulnerabilities that affect ActiveX, Java, and JavaScript are often applicable to e-mail. Apart from disabling these features, the ability to run Visual Basic Scripting (VBS) should be removed if possible.
Viruses such as I LOVE YOU contain attachments ending in .vbs which infect the host when user clicks on the attachment to open it.