You see them all the time. The paragraph of legalese at the bottom of e-mails that attempts to provide protection from misdirected e-mails. Do they do any good? There is little case law dealing with the issue, but legal experts say it can’t hurt to include them.
These disclaimers identify information that your company considers confidential and helps protect the company in later legal disputes. Of course, if every e-mail includes the disclaimer, the other party could argue that the disclaimer carries little weight.