Email notification on New Blog Creation

1. When a member create a new blog in dropdown menu for BP they never get the email confirmation.

I get a notification but I want to be able to send them an email as well.

2. Also the email that send me the notification is from my host mydomain@box429myhosst.com.

How do I change which email sends out these notifications?

How do I fix these problems?

I use Blogs-MU Theme