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OK, so what you’re saying is that if I’m a spammer and I spam you but get a bounce back, then I should expend extra effort to further spam you. (Even though anyone with the sense of a goat would realize your smart enough to be using MailWasher or something and all I’m ever going to get from you is bounced emails.)
But, if I get nothing back then I should assume the address is bad even though email sent to bad addresses are bounced by the distant end server? Perhaps I have slyly set up my email server to accept emails sent to bad addresses and bounce only those sent to real adresses.
Is that what you’re saying?