I need an admin for an Exchange 2013 install.
We have had this server up and running for over a year.
Yesterday we started getting errors while sending/receiving email. The incoming has been spooling at our spam filter.
The error we are getting is 451 4.7.0 Temporary server error. Please try again later. PRX4
Have rebooted the server, flushed dns, restarted services, to no avail.