This morning emails are going out, but not to all domains, Gmail.com customername.com etc... but others do go out, hotmail.com yahoo.com companyname2.com. We are seeing this error on the delay/relay
[PS] C:\Windows\system32>get-queue -identity fuscex1\gmail.com | fl
RunspaceId : e61498f9-f922-XXXX-97ff-d28cc1dd7ca1
DeliveryType : DnsConnectorDelivery
NextHopDomain : gmail.com
TlsDomain :
NextHopConnector : fd3906a8-5e16-XXXX-94aa-3f32f22abd56
Status : Retry
MessageCount : 28
LastError : 451 4.4.0 Primary target IP address responded with: "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 alternate hosts.
LastRetryTime : 1/17/2013 2:06:40 PM
NextRetryTime : 1/17/2013 2:11:41 PM
DeferredMessageCount : 0
QueueIdentity : XXXXXX\115354
Identity : XXXXXX\115354
IsValid : True
We have tested DNS and its okay, we have tried SMTPDIAG and passed all test to GMail.com, We have restarted the transport, we have called the ISP, we have rebooted both email and dns servers.
so this is confusing and we are all scratching our heads trying to determine the next steps.
Any and all help would be much appreciated.