Exchange 2013 SP1 with no DAG. Migrated about 2 days ago. The send connector is the same one from the old exchange server. Here is the error:
2014-11-27T02:23:23.699Z,External Send Connector,08D1D7FFAC71C5B0,0,,external.ip:25,*,,attempting to connect
2014-11-27T02:23:23.699Z,External Send Connector,08D1D7FFAC71C5B0,1,,external.ip:25,*,,"Failed to connect. Winsock error code: 10013, Win32 error code: 10013, Error Message: An attempt was made to access a socket in a way forbidden by its access permissions
external.ip:25"
This send connector worked on the old exchange server. Mail just sits in the mail queue. I have tried using a smart host with the same results.
I can telnet to that external ip without any errors. Firewall on server is turned off. Powered old exchange up and took out the new exchange server in the send connector and put in the old exchange server and mail queue empties.