Email updates from Metamask are mostly fake and sent from emails that are not clear not from its official, not only that you do a search on Google, Yandex, DuckduckGo, also often phishing sites metamask name at the top of the appeal of the official link.
Because metamask has a lot of users --- 30 million monthly active users, more than 100 million people who have downloaded this wallet, so this is the target of hackers to decompose your wallet.
https://coinlaw.io/metamask-wallet-statistics/There are many ways to avoid this and I think it's easy, just read and be more thorough.