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What could you do if someone sent spam specifing your domain as return address?
Opened my outlook today and got 480 "nondelivery reports". Holy cow!
Looks like someone sent spam specifing my domain in return address and did it by purpose (why?). I can only imagine the total amount of letters sent, if I got just 480 non-delivery letters in my mailbox.
Any suggestions how to prevent worst consequences in this shitty situation? Thanks.
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