Use this plugin instead: WP Better Emails
There’s not much setup involved. Just install and activate the plugin.
You can modify the emails, but they work pretty good out of the box, so unless you really need to make changes, and you know what you are doing, I wouldn’t suggest changing anything.
I changed the logo, edited the header to make it look better with the logo, and changed the email address, but that’s all I had to do. It’s much better than the default notifications that come standard with WordPress, in my opinion – and allows me to change them easily.
If you need help getting this plugin installed and setup, contact us.