_www sending spam emails
I am running Leopard Server 10.5.8 and I have been hacked and I don't know how.
Starting last night, the _www account started sending spam emails at about 1 per second.
I have turned off mail sending to slow the activity, but I can't seem to find the process that is generating the messages.
Any suggestions on how to go about shutting this off?
I have ClamXav running, but it it running very slowly. This is the only mail server for the company, so I need to get it back up as soon as possible.
Mac mini, Mac OS X (10.5.8), Server