Chris Stenton wrote:
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?
May be backscatter from a joe job. Someone using random addresses in your domain as 'From:'-addresses in their spamrun, and what you see are the bounces.
I'm getting a lot of that as well on a small mailserver I admin.
--
Regards,
Marco.
