I would like to be able to add multiple accounts to the same. Now I know you can link accounts, but what i really want is to be able to send and receive emails via one mailbox (so I might receive an email to one of my addresses but I want to send a response with another.)

I have my domain hosted with domains.live.com, but I cannot work out how to add a new send/receive account to my mailbox. I tried adding it with the pop of pop3.live.com but then it tells me I need to link the accounts, which I don't mind, but I want to be able to consolidate my mailbox.