Some are quite easy, like this e-mail I received sent overnight. I was immediately suspicious. Dear Premier Inn Customer, We designed this program to provide you with a convenient and warm way to reward our customers with the Premier Inn Luxury Pillows 2-piece set. Our goal is to emphasize the importance we place on our customers and create an environment where each customer feels appreciated. We are delighted to inform you that you have been selected as one of our valued winners! As a gesture of our appreciation, we are pleased to award you a Premier Inn Luxury Pillows 2-piece set. Thank you for your continued trust and engagement. CLAIM YOUR REWARD Just checking the sender's address was easy enough, as it wasn't from Premier Inn. Why they would want to give me a free gift, I've no idea. Don't need one. The offer didn't include any encouragement to make another booking. I use Firefox, so I put the sender's address in the "block sender" facility and moved the e-mail to "scam." The concerning aspect is that we have used Premier Inn, but not for over ten years, but we booked on-line. So it would appear Premier Inn customer's e-mail addresses may have been hi-jacked.
The email address was probably sold. That was probably a scam to get you to do a survey and at the end you have to pay shipping on the pillows and thereby they get your credit card info. Best to not even open them because once you do they can tell it was a valid email address.
As I said, these are easy to spot, just by looking at the sender's e-mail address. I'm amazed that so many people answer e-mails from their "bank." Banks only put messages on their websites, which you need a password to access. There's so many attempts at scamming, that every few months I have to delete some of the older blocked addresses, to be able to put in the latest ones. "Unsubscribe" instructions in e-mails are also a way in to your computer. Far better to use "block sender" instead.
