Online shopping is relatively safe since most ecommerce stores use a secure (https:// ) connection . Most people use email for personal correspondence , sending jokes and other trivial information, so email security solutions are not easily available. But if you use email for sending confidential information like pricing or potential buyer information, the current solutions are inadequate. Your well funded competitor will hire a hacker who will intercept, delay and modify your emails and the damage can results in losses of thousands of dollars or more.
http://www.anonic.org/online-security.html