Open relays are back! Spamhaus shares the sad story that history is repeating itself and spammers are once again finding and exploiting open relaying mail servers to shovel spam at you.
Fighting the open relay problem was a big part of my initial spam fighting efforts, back in the day.
A bunch of us sort of chuckled back in 2004 when the FTC finally came around to start talking about stopping the scourge of the open relay -- too little, too late, it seemed. But, maybe that's not so long forgotten as we had hoped.