Hi,

I'm getting this error when attempting to send messages to a domain rcmoore.com. I'm unable to send or receive messages from this domain. And my exchange 2010 queue viewer gives me an error

: 451.4.4.0 Primary target ip address responded with 421.4.4.2 connection dropped due to socket error " attempted failover to alternate host, but did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.

Please help.

Subin Suresh

Hello Subin,

Have you tried a telnet to port 25 of the sending domain from the Hub transport/edge (if edge is presented)? This is required a success send. If this is not an issue, try Unchecking of "Enable Domain Security" at the properties of the send connector and do a test

Hi,

While i'm do a telnet to rcmoore.com 25, nothing happens. And the enable domain security is already unchecked.

Regards,

Subin Suresh