Tom has been getting spam email from people who have had their email address hacked. Leo says that there are programs that can be used to spoof random email addresses since email programs have a "reply to" section that can be used with any email address. So it's likely the email address wasn't hacked, but that someone is just spoofing them. Leo says to use GMail because they have better security. Google's spam filter is far better because it's collaborative. So Tom should report it and then it'll get blocked. Unfortunately, though, the spammers will move on to another email address sooner or later.