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Mail delivery failed: returning message to sender

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lbmann
lbmann
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For the last month or so, I receive this message at my Email In-box (leemann@windyridge.us). Problem is, I didn't send the email and don't know the recipient (not always the same recipient). Have .jpg of the message should you want them. What's up?

Lee

For the last month or so, I receive this message at my Email In-box (leemann@windyridge.us). Problem is, I didn't send the email and don't know the recipient (not always the same recipient). Have .jpg of the message should you want them. What's up? Lee
已附加屏幕截图

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Matt
Matt
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It is called backscatter. See https://en.wikipedia.org/wiki/Backscatter_(email)