Bob's MOSTLY right...
Bob states that 'it's not necessary for the user to trigger a virus' (or words to that effect). He's MOSTLY right about that. In todays computing world, software makers are trying to produce applications to make our computing tasks easier to accomplish, and incorporate 'features' into their software to help us along- Things like 'auto-executing' e-mail attachments or running (my favorite peeve) Visual Basic scripting (.vbs). When you receive your computer or software, the 'out-of-the-box' setting for these convenience functions is usually 'enabled' by default. If you don't go back and change these settings (disable .vbs scripting, turn off preview panes, turn off auto-execution, etc) then Doug is right- YOU ARE VULNERABLE, and there's little or nothing you can do to protect yourself until you change these settings. In the case of autoexecution (.vbs or otherwise), the user's trigger action was to open the e-mail (and let the software do the rest for you). Bob may not have hit a button that said 'Run this virus', but he probably (unknowingly) had his Eudora software set (by default) to do it for him. Moral: The e-mail itself is harmless if left alone or deleted. It's the software that opened the e-mail and ran the attachment that did the damage. Any e-mail client that runs .vbs scripting is vulnerable until .vbs is disabled.NOW, for a few suggestions on how to protect yourself from e-mail viruses.My biggest recommendation is to use a web-based mail service such as Yahoo or Hotmail. Yahoo is very feature packed, I get VERY little spam from them, and most of it's caught by their spam filter. By using their web interface, I have virtually NO chance of an e-mail virus infecting my machine just by opening a suspect e-mail. If I want to run a suspect attachment, I have to download it first, which brings me to my... Second recommendation- NEVER open ANY attachment until it has been scanned by TWO major anti-viruses. I use Norton and McAfee- They're both good programs. Sometimes Norton finds them first, other times McAfee is first- it's about a 50/50 shot on who's fastest. It mostly depends on whose developers can get a good definition for the virus incorporated into their software first. Finally, do your best to keep e-mail simple. All the bells and whistles that go with making e-mail cool (backgrounds, fonts, sounds, borders, etc) also open the door for security holes like viruses or hackers. If plain text will do what you want it to, use it. If simple HTML works, go for it. If you need to code backgrounds or scripts into e-mail, perhaps a better solution is to build a web page with the info, and send a link to the web page via e-mail. To address Peggie's question about auto-execution... What I suspect happened was that she received an E-mail in HTML format, and there was a Java pop-up script embedded into the page somewhere (just like the annoying pop-up ads on the web). I've been to some sites that are so obnoxious that I've had to disconnect my web connection to get the pop-ups to stop. Can this be prevented? Maybe- depends on your e-mail client and web browser.Compute carefully, folks. It's a wild web, and not everyone on it's nice.--Jon Bastien...A network administrator and computer security technician in my day job.