I have my own email server, so I can make up as many email addresses as I want. So I make up a new unique email address for every company I do business with. That way, if I get spam email I know where it came from.
I have been doing this for years, and have about 12 companies that either sold my email address, or had a security breach that allowed my addresses to be stolen.
This weeks spammer of the week award goes to KFC. In the last 5 days, I have received 106 spam emails to the address I used to complete a KFC survey. All of the ip addresses from the spam came from Romania.
Shame on you KFC!