how to set up email notifications when posting a new blog in a space

[Meir Ben Salmon]

Hi All 

I am trying to achieve the following: 

1. I created a space for our Product team. 

2. I created a group called product and added all of the relevant people. 

3. I want to configure the space, so when any user creates a new blog under the space, the product group will be notified via email but for some reason, they don't get notified. 

Any idea if i am missing something? 

Thanks