Mail delivery failed: returning message to sender
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
Todas as respostas (1)
It is called backscatter. See https://en.wikipedia.org/wiki/Backscatter_(email)