When this other account receives email, it will automatically forward the email to your main inbox.
To create an alias, click on the More mail settings screen.
For this reason, mail forwarding is a faster, better solution if your other account supports it.
For more information about these limitations, check out Microsoft’s help page on the subject.
Outlook.com’s mail fetching feature is ideal when you have another email account that can’t automatically forward mail to you.
It will work with any email account that supports the standard POP3 protocol.
This process will be different depending on your other email account.