Thank you. I was able to track down the infected computer. Yes, it is a shared IP. I have applied for rDNS At our location we have outside visitors that use the network daily. If port 25 is blocked how can outlook users send/receive email?
Looking for more details about spam trap hits from our ip: 126.96.36.199. There was also an additional warning about reverse DNS. I have contacted our ISP about this, but it takes some time to setup in China. I have emailed the deputies a few times over the last few business day but have not recieved a response. We are not currently listed, but would like to prevent getting listed again. Thank you