I get email notifications when someone comments on my Facebook post but not when someone likes it. I went through the notifications settings and couldn't find where to set the like notification on/off. Where is it?
It's there in the notifications section, it's just far down and buried amongst a lot of others.
From Account Settings or Privacy Settings, choose Notifications in the sidebar menu. Expand the Email section and Turn On any notifications you wish to receive.
Likes on your post is about half-way down the list.