We recently moved from Exchange 2003 to 2010. We successfully configured and remove 2003 server. Suddenly last night, we can't receive inbound e-mails. When I verify the issue, the server is down and it shows blue screen error. I restarted the server and I'm able to send and receive e-mail on local and send e-mail to internet.
But not receive mail from internet.
II ran the troubleshooter and it shows:
mail submission failed error message the smtp host was not specified
When I verify the Client Send Connector, the FQDN is empty. Then I specified FQDN as mail.mydomain.com
After that I found this:
In the event log:
Microsoft Exchange could not find a certificate that contains the domain name mail.mydomain.com in the personal store on the local computer. Therefore, it is unable to support the STARTTLS SMTP verb for the connector Client EXCHANGE2 with a FQDN parameter of mail.mydomain.com. If the connector's FQDN is not specified, the computer's FQDN is used. Verify the connector configuration and the installed certificates to make sure that there is a certificate with a domain name for that FQDN. If this certificate exists, run Enable-ExchangeCertificate -Services SMTP to make sure that the Microsoft Exchange Transport service has access to the certificate key.
I'm sure that network is working fine. Any further help would be greatly appreciated. Thanks.