I have an exchange 2013 server, it has been in place since July, 2013. it has worked well. There is a problem though I've had some issues with emails getting stuck in the drafts folders. it has happened 3 times. First time i change the external DNS lookups to be set to an outside server. Mail began to flow again. 2nd time i rebooted and then restarted transport and crossed my fingers. Mail fixed itself. Now i have the same issue and I'm at a loss as to what is causing this.
Anyone else having this issue out there? If so can you point me in a direction to get this from happening.