THe last few days, users on our SBS 2003 R2 box have been having problems sending emails to some domains (msn.com, yahoo.com and hotmail.com specifically).
When I go into server management, wind my way into the ques of exchange, I see entries for each of these domains, the number of messages for these 3 domains is not zero, the state is retry.
When I click on the line, the status line at the bottom says :
The remote server did not respond to a connection attempt.
I restarted the server and that didn't help. things were working great for months / years till this happened over the last few days.