I am aware about spoofing and it is possible to send an E-mail using any address you wanted.
My question is: Is it possible to receive an E-mail using any address you want?
Example: I received an E-mail from iamhimATprivatedomainDOTcom, that has been spoofed. Is it possible to reply to the address and the person who is trying to spoof me, received the E-mail even though privatedomainDOTcom is a private email server?