I have been looking at my mail logs and wonder if this is now the norm
Mail stats for last 24 hours
3020 Total mail messages 2143 reject "unknown user" 206 reject RBL 39 reject Virus 158 SPAM messages caught by SA 3.0 474 genuine mail messages
The number of "unknown user" rejects has grown really fast over the last 4 weeks. I am not sure what the spammers motives are as the success rate must be near zero?
Chris