You don't have to be a security expert to know that sending important information via unprotected email is risky. From the moment you click Send, your message travels over unsecured networks where anyone with a nifty little tool called a sniffer can search it for specific words or names. Even the federal government has its own official sniffer, which it uses to track the mail of suspected criminals.
There's no reason to think your correspondence will escape similar scrutiny. To make sure your email isn't fair game for thieves, you need to encrypt it. Otherwise, your business secrets could be thrown to the dogs.
