Alias with same name as user?

I want all email from to be forwarded to At the same time, I want to be able to login and manage the box via Is it possible to create an alias with the same name as a user account? Will this properly forward email? No glitchyness or anything?

you can create an Email account on your box named, then login to your box via roundcube and enable forwarding for your Email to
this is how you enable forwarding via roundcube ->