This is a brand new exchange 2013 install. Last night at 10:58 is was sending and receiving mail. This morning, it's not.
I can telnet to it, but I don't get the standard reply, I just get a black screen.
My outlook and OWA can connect and login, but all outbound mail sits in the drafts folder.
Inbound does not arrive, nor is there a bounce.
Certs are all public, and good.
I'm at a loss where to look.
This is Exchange 2013 on Server 2012, standalone install.