Other scams offer investments with huge paybacks. They always claim to be risk-free naturally, but once you've sent them your money it's highly unlikely you'll ever see any of it again, let alone profit. A similar scam involves credit cards for people with poor credit ratings. You send them a security deposit and processing charge and they send you a credit card. Unfortunately, once they have your fees you'll never hear from them again.

These fake offers are particularly bad for legitimate businesses who use email for doing business. Because so much email is spam, the internet service providers and email hosting companies work hard to filter it out. But these filters can sometimes stop legitimate email from businesses you want to hear from.

How To Avoid Getting Stung

Firstly, never ever reply to spam, either by hitting reply or by clicking a link in the email. These things will only serve to confirm your email address is active and you will shortly start to receive much more spam than you do already.

Above all, never give your credit card number, bank account details or private data to anyone unknown over the Internet. PayPal, for example, and other legitimate online businesses will never ask for your password in an email. One common scam is to fake return addresses and tailor subject lines and content so the message appears to be from them or another financial institution 'confirming' your information. Don't fall for them.

How do you know whether it's spam? Since, one man's spam is sometimes another's welcomed advertisement, there's no perfect answer. But there is one good rule of thumb: if you don't recognize the sender, it's probably not someone you want to hear from. After all, how many former dictators in Nigeria are you likely to know?

Are you wonder how to safely avoid email scams and other online security threats? Find out how to stop spam and other threats on the Online Security Toolkit website. Visit http://www.onlinesecuritytoolkit.com for more information.