Instructions apply only to Outlook.com, the free web-based email service from Microsoft.
ChooseView all Outlook options.
Go toMail>Sync email.
Add an email account in theAdd a Connected Accountsection.
Select theSet default From addressdrop-down arrow and choose the address you wish to use.
Close theSettingswindow when you’re finished.
Your new default From address has been set.
To have email replies go to a different address, change the address in the From line.
sign on to Outlook.com.
Start a new message, forward a current message, or reply to an existing message.
Select theMore commandsicon () in the composition pane or window’s top toolbar.
Choose the address where you want replies to this email sent.
When the recipient replies to the message, you’ll receive it at this address.