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Spammers are increasingly using PDF files to bear their spam messages. This practice begun in mid-2007, primarily as a scam to fool recipients into investing their money in the stock of a particular company of their choice. The use of junk mail with PDF attachments takes up even more Internet bandwidth. This is because PDF files are generally much larger than the embedded pictures and graphics used in image spam. Image spam is typically in GIF format; PDF files are upto 3 times the size of these files. Protecting Your Kids Like all other Internet users, children are just as susceptible to receiving spam as are adults. And because spam is an equal opportunity menace, kids are just as likely to receive spam that contains adult and pornographic material. While there is really no way to totally eliminate the possibility of your kids receiving spam, there are steps you can take to minimize it. Whitelists - Set up an email account for your child that "whitelists" only specific email addresses. A whitelist is just a list of trusted and approved email addresses. For example, you can have the addresses of your child's grandparents, aunts and uncles whitelisted. Whenever email is received from any of the whitelisted addresses, it goes directly to your child's inbox. All other email addresses are blocked. JavaScript: The spammer can use Javascript that will ensure that the spam is only visible when the email is loaded. This type of spam can only be prevented using anti-spam software that decodes or blocks the java script. Using your email spam filter, you can set up a rule that will ensure that a copy of every email that is sent and received on your child's account is forwarded to your own email address
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