Fake forword or not? And true what is the initial sender (the first sender?)
Received: from unknown (HELO YOURP0BLJZQX5) ([email protected]@[188.nnn.nnn.nnn])
Please refrain from posting all header information as it contains IP addresses and email addresses.
With that said, I've edited the header and have left what I believe is the originating IP address.....at least the beginning of the IP. You can figure out the rest by looking at the information you submitted.