On April 14, 2007, I signed up for an AmeriTrade account using an e-mail address consisting of 16 random alphanumeric characters, which I never gave to anyone else. On May 15, I started receiving pump-and-dump stock spams sent to that email address. I was hardly the first person to discover that this happens. Almost all of the top hits in a Google search for “ameritrade spam” are from people with the same story: they used a unique address for each service that they sign up with, so they could tell if any company ever leaked their address to a spammer, and the address they gave to AmeriTrade started getting stock spam.”
ameritrade has an insider selling email addresses. they need a SOX audit