I have the certificate installed. I have enabled certificate for SMTP which should enable TLS support. I have the exchange server is behind the firewall and have the it with a public IP and FQDN exchange.domain.com. I have created spf record in my dns server.
When I do a testexchangeconnectivity.com.
Inbound Mail SMTP Test
I get "Transport Layer Security (TLS) is not supported on this SMTP Server."
Outbound Mail SMTP Test
ExRCA wasn't able to find the SPF record.
Any advice would be appreciated.