You have an Exchange Server 2010 Edge Transport server. You discover that e-mail
delivery to an external SMTP host named Host1 fails. You need to identify which SMTP error
codes occur when the delivery to Host1 fails. What should you do?

A.
Run the Queue Viewer.

B.
Enable pipeline tracing.

C.
Run the Mail Flow Troubleshooter.

D.
Configure the protocol logging level on the Send connector.