That advice is fine for the technically savvy but doesn't work for a lot of normal people who don't have the knowledge to mentally parse urls.
https://getsupport.apple.com/customer?cvid=8c11bcc71f684b6ab405d4fa1e86c146
https://getsupport.apple.com.phish.xyz/customer?cvid=8c11bcc71f684b6ab405d4fa1e86c146
People just pattern match on the substring "apple.com" because they don't understand that the DNS system works right-to-left. Therefore, the 2nd url looks just as "legitimate" as the first one.I work with senior citizens and tried to explain how to parse the domain in the URL by looking for the first forward "/" after the "https://" and then scan backwards but they find that mental algorithm confusing and those instructions don't stick. (This is actually an area where some AI on phones/desktops could assist people decipher urls or mark them as suspicious.)
The other problem with that advice is people can't "whitelist" the legitimate domains to look for because they don't know ahead-of-time what they are. E.g.:
- An Amazon verification email will be sent from "account-update@amazon.com". It's intuitive to predict something coming from "@amazon.com" so a mental whitelist filter works in that case.
- However, State Farm Insurance legitimate login verification codes are actually sent from "noreply@sfauthentication.com" instead of the expected "@statefarm.com"