You can originate emails from anything - it just requires that you set it up as an alias (and you can set custom signature etc...) You don't need to explicitly

You can originate emails from anything - it just requires that you set it up as an alias (and you can set custom signature etc...) You don't need to explicitly setup recipient addresses! I can have as many xxx@myname.mydomain.com addresses, where xxx is anything at all. myname@mydomain.com is my main email address.