I have customer where as of Friday the emails stopped coming in to the SBS 2008 Exchange.
At first I was troubleshooting the server to find nothing wrong with it. Finally I found that for some reason the ISP is blocking port 25. Before I found out I already called them to ask and was told that they are not blocking it.
So what I'm doing now is open port 2525 on the firewall and forward to port 25 on the server. I can telnet on port 2525 I can connect to the server and when I do a packet trace the packet flow to the server.
But the problem is that the emails don't get to the server. I can send emails using a smart host from dnsmadeeasy.com using port 5525 but not able to receive any emails
Should that not work what I'm doing? Or is there a step I'm missing?