Hello
I am having the same issue as the user here:
http://social.technet.microsoft.com/Forums/en-US/3c1e874a-e18a-4b01-ad5e-477acc266ebc/exchange-2013-everything-works-except-outgoing-emails-to-gmail?forum=exchangesvrsecuremessaging
Same error message... I can send to every mail server around the world except for gmail I get the following error:
Remote Server at gmail.com (2a00:1450:4001:c02::13) returned '400 4.4.7 Message delayed'
28.01.2014 12:42:14 - Remote Server at gmail.com (2a00:1450:4001:c02::13) returned '441 4.4.1 Error encountered while communicating with primary target IP address: "Failed to connect. Winsock error code: 10051, Win32 error code: 10051." 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 2a00:1450:4001:c02::13:25'
What can be the reason?
Thanks
James