It's not new, these are scams people have created over the years to trick people into thinking they are legit by blinding spamming everyone hoping for a hit. It's purely a coincidence that you've received one when waiting on a package, and it's those coincidences that the scammers are hoping for to help "legitimise" the email.
UPS are aware of these and others:
http://www.ups.com/media/en/fraud_email_examples.pdf
You just need to use common sense. As much as we are in a "digital age", courier companies are still in the last century when it comes to communications. In all the years I've received numerous packages from overseas from just about every courier service in the book, I have NEVER received an email about a package which they failed to deliver, or was stuck in customs etc. Letters are still king. Besides, retailers rarely give this information to couriers in the first place since they don't require it. A delivery address, a contact name and phone number is all they want.
Just be cautious.
