Had an email from Arnold J Matthews?

It was from me. The warning was real, and sent as there is no doubt whatsoever that the person I warned you about is a scammer.
Please reply and tell me that you have understood and heeded my warning. Some of my warnings inevitably go to scambaiters, but please let me know. I won't interfere or spoil your bait,
It means I can cross you off my list, and warn more people. Please ask if you need further help or information.