Deleted email

are you sure it was only sent to you once?
spammers tend to re-send their garbage over and over...

This is most likely because of the way your account is set up. If you are using a POP3 configuration, even if you delete it off your computer, it is usually still saved on your mail provider's server, so that every time your computer updates your mailbox, it finds that same message again, and loads it back onto your computer. The easiest way to remedy this is to use the online interface of your mail account and delete the message there. If that doesn't work, there is a problem with your mail software, but this usually isn't the case and something weird is just happening on the other side of the mail server. Hope this helps!