Return Path: How to Steal Reputation
‘“Reputation hijacking” is intended to describe when a spammer or other bad actor uses someone else’s system — usually one of the large webmail providers — to send their spam. The idea is that in doing so, they’re hijacking the reputation of the webmail provider’s IPs instead of risking the reputation of IPs under their own control. But I really have to laugh (though mostly out of sadness) whenever this technique is described as something new.’


