Some records are out of date. The best way to find email addresses for students, faculty or staff at another college or university. Connect to the institution's Web site and then look for a campus email directory. Last updated 1996, though. The Infodome reference page has more material on colleges also.
Many addresses are out of date.
You can also try throwing the person's name into your favorite search engine, which may find them if they have a web page or contribute to lists or newsgroups that are archived on the web.