Pointing one domain to another domain is called Domain Parking. With this, the Parked Domain and Main Domain display the same website. So, even though a Parked Domain cannot have separate web statistics, it can have email boxes.
For example, yourdomain.com -> mydomain.com, i.e., yourdomain.com and mydomain.com, will open the same website.
The primary domain, http://mydomain.com, will need web hosting and domain registration. Whereas the parked domain, yourdomain.com, will only need domain registration.
In addition, nameservers (DNS) for both domains must be the same; this is very important; otherwise, the parked domain will not work.
To obtain the nameservers for your domain, you can contact email@example.com.