Go to your e-mail.
Go to your inbox.
Click on box next to the message that is spam.
Click the box that says Spam.
You have now labeled the e-mail as Spam and any further e-mails from that person or company will be Spam. I also think that the computer will slowly figure that certain types of e-mails are Spam.
How to get things out of your Spam Folder or what to do when a friend or relative's mail gets sent to your Spam Folder.
Your e-mail is set up with a few folders. Here is what
it looks like. 
Click on the Spam Folder.
Click on the subject of the e-mail.
Click Not Spam. 
Click on the word next to Spam; empty. That will clear out your Spam problem.