Eudora and the AOL 6.0 email readers are not affected because JavaScript is turned off by default. Web-based email systems automatically remove JavaScript programs from incoming email messages and therefore are not vulnerable. My suggestion is that you check and be sure that both HTML and JavaScript are turned off. Nobody needs this kind of stuff. A popular first class email handler that is first rate.
Nobody benefits from it.
Here, Bob explains how the pros send spam in complete safety. And what little one can do, really, to put an end to the stuff. He wraps, though, with a neat trick for decreasing spam in your in-box. The surprising thing to me is how much legitimate mail looks like junk. Here are some suggestions for making your email stand out in a positive way.