email has now implement warning message... here is their statement below.
Making email safer with anti-phishing security checks in Gmail on Android 5/03/2017 This week, we’re introducing a new security feature in Gmail on Android to help you keep your email safer. When you click on a suspicious link in a message, Gmail will show a warning prompt helping you keep your account safe. Here’s what you’ll see: While not all affected email will necessarily be dangerous, we encourage you to be extra careful about clicking on links in messages that you’re not sure about. And with this update, you’ll have another tool to make these kinds of decisions.source:Google