I have MS Exchange 2013 with 200 mail boxes. All are send/receive fine. But only one domain is not receiving our emails and we also not able to receive emails.
Delay error is found in outlook. Finding error in queue viewer " Failed to connect. Winsock error code. 10060. Attempted fail over to alternate host, but that did not succeed.
Error detail is:
Diagnostic information for administrators:
Generating server: Exch01.domain1.com
Receiving server: mail2.domain2.com (210.2.154.19)
Remote Server at mail2.domain2.com (210.2.154.19) returned '400 4.4.7 Message delayed'
1/16/2019 11:01:19 AM - Remote Server at mail2.domain2.com (210.2.154.19) returned '441 4.4.1 Error encountered while communicating with primary target IP address: "Failed to connect. Winsock error code: 10060, Win32 error code: 10060." Attempted
failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts. The last endpoint attempted was 210.2.154.19:25'