I have a server running 5.0.13 NE on Ubuntu 8.04 and its been running for a few months with no problems. All of a sudden I keep getting messages that its been listed in the CBL.
Following a few of the posts on here, I have run a rootkit check and everything was fine. Since I'm running on amazon's EC2, I checked my relay and made it very restrictive
Mta trusted network: "127.0.0.0/8 10.254.199.144/32"
My external IP address has not changed...I'm not sure why we are getting on the CBL. Does anyone have any troubleshooting steps? What info should I be looking at and where would i find it?
Any help is greatly appreciated.