Hi All,
We are running exchange server 2013 on CAS and mailbox role on separate servers,i have created a receive connector for an application to relay email ,for some reason i am not able to do telnet on port number 143 ans 993 from the application server to the mailbox server.
But telnet to port number 143 and 993 is working on CAS servers,can someone help me why is it not working on mailbox server?