Have gotten 3 emails in the last 2 days purportedly from FedEx as follows:

Dear customer.

The parcel was sent to your home address.
And it will arrive within 7 business day. You can see details in file
attached below.

Your tracking number is 1764-78103-4529

Thank you.
FedEx 1995-2013

There is a link to click on, supposedly to track the package, but it is a zip file, uhhh, I don't think so.
If you get one of these, you can write down the number and go to FedEx website and enter it if you want to see if it's legitimate, but I sure wouldn't click the link in the email.