Everything posted by orlandoc
orlandoc posted a topic in SpamCop Blocklist HelpIt appears as if all inbound messages to our domain (rrjfs.org) are being bounced back with the following message: 126.96.36.199 does not like recipient. Remote host said: 550 5.7.1 188.8.131.52 has been blocked by Spamcop Giving up on 184.108.40.206. When I test our email server locally using telnet on port 25, I get the same message stating that my INTERNAL ip address being blocked. I am now getting messages stating that my local gateway ip is being blocked by Spamcop as well. This sounds like a virus to me, but I cannot seem to find any information that matches that my sepecific problem. Help!
orlandoc replied to orlandoc's topic in SpamCop Blocklist HelpThanks for the input! It looks like the problem has been resolved for now, but the cause is still unknown. I stopped the Virtual SMTP Server on my Exchange 2003 Server, and created a new one with the same configuration as the old one, however with a different name. After I started the service, I tested using telnet (locally). Now the RCPT message "xxx.xxx.xxx.xxx is blocked by Spamcop" was gone, and I was able to send and receive email from internal and external domains. So far so good, but like I said, I still don't know what caused the problem to begin with. The BlueGateSoftware domain is my personal email email host, which I used to test the inbound messages. Each time I sent an email to my work domain it was rejected, with the NDR showing a different IP address, all of which were stated as being blocked by Spamcop, and which appeared on several RBL servers. I have run anti-virus and malware scanners on the Exchange server repeatedly, and it appears to be clean - all the more puzzling. This weekend all machines on the network will get similar workouts, the thought being that maybe there is a machine on the network that passed a virus to the Exchange server and hijacked the SMTP service.