My domain is scooters.com.
I went into the godaddy console and put the identical a record and mx record into skateboards.com.
Which is another domain i own in the console.
I can access skateboards.com through owa as if it is scooters.com.
I can send and receive between scooters.com and skateboards.com.
however I cannot receive incoming email in skateboards.com from anywhere else.
Anyone in my organization can send mail with a skateboards.com email but can't receive replies.
They can send but not receive.