- Coming from a domain that looks nothing like the official domain of the company, rather some generic @itservice.com or something. - Subject: "URGENT: your account is expiring soon". - Multiple links provided in the email body, all illegible and multiple lines long, none of them from a domain that I can immediately link to the company. - No alternative way of resolving the issue is provided other than clicking on one of those links (no "go to your account settings", "contact your line manager" or so).
And still, it turns out it was real.
~100k employees company btw