Hello!
I'm feeling very stupid right now and I don't expect that to change. I've set up a new PMG instance to catch inbound mail while we move an exchange server to a new location and then hopefully to act as a filter in future. To test it before relying on it, I've updated the MX record for an old domain I wasn't using to point at the new location. I've made sure the firewall has a port forward for port 25 inbound to the server. I have confirmed it by connecting to that port via telnet, and the pmg server replies. So far, so good.
I've added the test domain as a relay domain in configuration - mail proxy. In relaying, I've entered the exchange server's IP address and port (or at least, the port and IP for when it is installed). I've also tried explicitly adding an entry for the test domain in the transports section.
I've sent test emails from a number of hosts and it's as though they never arrive. Also, when I use the mxtoolbox SMTP test (https://mxtoolbox.com/SuperTool.aspx) it correctly resolves the IP address, but says it can't connect, timing out after 15 seconds - which is nuts, because I can connect without trouble.
I know I'm missing something fundamental, I just don't know what it is. I've read and followed the latest documentation, thought I got it right... can anyone tell me where I've gone wrong?
I'm feeling very stupid right now and I don't expect that to change. I've set up a new PMG instance to catch inbound mail while we move an exchange server to a new location and then hopefully to act as a filter in future. To test it before relying on it, I've updated the MX record for an old domain I wasn't using to point at the new location. I've made sure the firewall has a port forward for port 25 inbound to the server. I have confirmed it by connecting to that port via telnet, and the pmg server replies. So far, so good.
I've added the test domain as a relay domain in configuration - mail proxy. In relaying, I've entered the exchange server's IP address and port (or at least, the port and IP for when it is installed). I've also tried explicitly adding an entry for the test domain in the transports section.
I've sent test emails from a number of hosts and it's as though they never arrive. Also, when I use the mxtoolbox SMTP test (https://mxtoolbox.com/SuperTool.aspx) it correctly resolves the IP address, but says it can't connect, timing out after 15 seconds - which is nuts, because I can connect without trouble.
I know I'm missing something fundamental, I just don't know what it is. I've read and followed the latest documentation, thought I got it right... can anyone tell me where I've gone wrong?
