I am using Outlook.com to receive email from a number of mailboxes. In one instance, I am forwarding all emails from one of my gmail accounts to Outlook.com. However, I noticed that when I reply to emails received in Outlook.com from that gmail address seem to go out from my default Outlook.com address and not the gmail address. (Yes, I have set up that gmail address to be a Send Only email address, FYI).

Is it even possible to reply with the correct reply-to address, or does Outlook.com always reply from the default email address only?