I just designed a website for a client and he is asking me to submit the said website to 100 directories. Is it worth doing and if not what should I advice him?

This is a really good client who was very happy with the website and now he is asking me to submit the website to 100 directories. He says it will help him establish a footprint on search engine.

Before being a web designer I was an SEO intern back in 2009-10 during which time I used to directory and social bookmark submissions. But a couple years later I heard that there was an update that penalized such practices and they stopped giving search engine benefits.

So that brings me back to my current client, do I do the submissions for him? If so, how do I judge if a directory is worth submitting or no? Are metrics like DA, PA and PR still relavant?

If directory submissions is not a good idea what else should I suggest him?