Answering a forward email

Answering a forward email


I have 2 emails. To receive all in the same email box, I make a forwarding. For example: my original box is xxx@xxx.com, but I would like to receive yyy@xxx.com. However, when I receive these forwarded emails, and I reply, the sender appears as the address of the original box, ie xxx@xxx.com. How do I get the answer to be with the forwarded email address?

Thanks