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One of the lessons I learned early in life is to never confess the stupid things that I have done in public—unless there’s a good punch line at the end of the story. Well, there is really no punch line at the end of the story I am about to tell you, but I am going to tell it anyway, because it helps introduce some of the key issues and concepts involved when securing e-mail clients and servers.

In 1994, I was browsing the Web with my trusty version of Netscape Navigator (version 1.0—yes, the one that ran just great on a Windows 3.11 machine that screamed along on top of an ultra-fast 486 processor). While browsing, I found a Web page that was selling a really nifty Telnet client. This piece of software had everything: I could use Kermit, Xmodem, and Zmodem to transfer files, and it even allowed automatic redial in case of a dropped connection. I just had to have it, and I had to have it right away; there was no waiting for it to arrive via “snail mail.” I wanted to download it immediately.

Things being the way they were in 1994, the site’s Web page invited me to either call their 800 number, or e-mail my Visa information for quicker processing. I’m something of a night owl, and it was about 2:30 a.m., and no one was manning the phones at the time. Rather than wait, I naïvely decided to use my Eudora e-mail client and send my Visa card number and expiration date to the site. Download free E-mail Virus Protection Handbook.pdf here

Download free Recovering from a Trojan Horse or Virus pdf. It can happen to anyone. Considering the vast number of viruses and Trojan horses traversing the Internet at any given moment, it’s amazing it doesn’t happen to everyone. Hindsight may dictate that you could have done a better job of protecting yourself, but that does little to help you out of your current predicament. Once you know that your machine is infected with a Trojan Horse or virus (or if your machine is exhibiting unexpected behavior and you suspect that something is wrong), what can you do?

If you know what specific malicious program has infected your computer, you can visit one of several antivirus web sites and download a removal tool. Chances are, however, that you will not be able to identify the specific program. Unfortunately your other choices are limited, but the following steps may help save your computer and your files.

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