Phishing scams are unfortunately pretty common in this game. SE does have a notice about them on the Lodestone: https://na.finalfantasyxiv.com/lodes...ff65cc98c644ed.

A good rule of thumb is not to follow links that anyone you don't know posts in game (or anywhere else really). Also, if you are on a site that in asking for a password that you followed from a link, it is always a good idea to click to lock in your browser's address bar and check the security cert is to the correct website before imputing anything.