Exchange 2013: Cannot send or receive External mail
Posted on 2013-01-28
I have a new Exchange 2013 installation and am now able to send/receive mail internally but mail sent to external addresses gets stuck in queues. Mail from gmail and other external agencies do not come in either. I believe i checked over the send and receive connectors but am not finding the magic setting. Any assistance would be greatly appreciated.
Queues give the following error:
451 4.4.0 Error encountered white communicating with the primary target IP address: "421. 4.2.1 Unable to connect." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternative hosts.