Tradeloop's Member Blog And News: New Captcha Helps Capture Spam Emails

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We are the largest B2B marketplace for computer brokers, computer leasing companies, used computer wholesalers, third party maintainers and self-maintainers, who trade wholesale computer lots of used & surplus computers, bulk electronics, and hard-to-find used computer parts.

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Monday, December 15, 2008

New Captcha Helps Capture Spam Emails

Can you add 2+2?

Spam email programs can't, but (we hope) most Tradeloop members and end users can. We've added something called a "captcha" to our sales lead form to let legitimate queries in while keeping spam out.

One of the benefits of Tradeloop membership is the exposure you get in the industry and increased visibility to Web searchers. However, the downside to added exposure on the Web is often an increase in spam emails. That was becoming a problem in our system that generates leads for members by allowing non-members to contact them by an email form.

Previously, an email contact form was the best defense against spam bots because they couldn't fill out the form. They got a little smarter though - and so did we.

Now, when someone uses the sales lead form to send you a message, the sender will have to correctly answer a simple math problem. It's nothing too difficult - something like "What does 2 + 2 equal?" If the sender can't answer, the message isn't sent.

You may be wondering about the next step, should spam bots learn how to add. Not to worry: Customer Support will have the "How to Solve Differential Equations" tutorial ready in plenty of time.

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