I have changed the MX record on my own domain to have email delivered direct to my custom domain set up in Live Domains. This works fine and email to my own domain is sent straight to my outlook.com mailbox. If I was to change the MX record on another personal domain to the same MX as on my custom domain and create an alias in my email account to match a user on the second domain would email sent to the second domian make it through to my inbox as their is an alias set up or would it be rejected because the MX record is only for the domain set up in custom domains?