This looks very much like a scam perpetrated either by hacking or by email spoofing. I would recommend not replying either to the list or to the address given. Perhaps someone who knows Jon better than I might contact him at a different address to alert him to this message, in case he isn't aware of it and taking steps to remedy the problem already.
Stay safe,
Sarah
Hi,
I hope your week is going great? Actually, I need a favor from you. I'd appreciate if you could email me back when you get this ASAP.
Thank you!
Jon
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