Computer Help and Support

If it's legitimate, at the bottom should be not a link but a notice to go log into your Apple account and check-- but you know, don't click on a link, open a new browser and type the address in.

If it's bogus, there will likely be a link that if you click on, it will take you to a signin where they'll steal your ID and PW.

Usually these are bogus.
Sometimes I google the content of the email to see if anyone else has gotten it, and then everyone will be saying, "It's a scam."

They're getting smarter... used to be, there would be obvious misspellings and grammar problems, but now they're getting better at seeming more corporate.