In Hotmail accounts you can create aliases.
In Outlook you can select any of these aliases to send an email from so it looks like it’s come from that email account although it’s not actually an email account.
It would be useful if eM Client had this function also.
I have my main email account and a couple of aliases that I use for work purposes.
At the moment, I can’t send emails from that alias unless I sign in via the Hotmail web portal.
Thanks