Earlier quoted context omitted.
You don’t. You work with the leadership & security team. Any employee that clicks your phishing email gets an extra dose of security training. Those that forward the email to abuse@corp.com get a nice compliment
Just clicking the link is enough to fail? No need to enter private info or execute downloaded files? Either your phising emails are badly crafted or you expect employees to see the future.
It's particularly annoying where I work, as the company itself sends out a completely unreasonable amount of internal spam every.single.day - often with bad spelling/grammar, and very often with the contents being a single image with rendered text (why?!?!).