hi
Trying to set up enforced TLS in exchange 2010. Created a send connector for partners using DNS MX routing etc. Added the domains i want to route via this connector and used the shell to set up the enforcement list. So far so good. Now when mail uses this connector i get errros in the mail queues
451 4.4.0 Primary Target ip address responded with 454 4.7.5 certificate validation failure
421 4.2.1 unable to connect
What is happening here? How come some domains work and others fail with above. Is it something that needs to be configured on the destination side
many thanks