I don't need to tell you that e-mail has changed the way the world communicates. I get more e-mails by far than I do letters delivered the old-fashioned way. That said, there's one aspect of e-mail that many of us overlook at our peril, and that's the information we put in our messages.

E-mail was not intended as a secure means of communication. Whether you're an attorney, an accountant, a CEO, a chief financial officer or an internal auditor -- even if you work at home or are retired -- you need to know that what you put in an e-mail could one day become key evidence in litigation.

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