HEY was advertised "as a totally new way to look at and process your email. They said that their new approach transforms email into something you want to use, not something you’re forced to deal with." This sounded like something I could use.
I received an email from an unknown person saying that I needed to give him access to my iCloud account! I ignored it at first figuring it was a phishing scam, but he persisted and stated that he had purchased an Apple Watch from me on eBay and it was locked.