You have an Exchange

You have an Exchange Server 2010 organization.You need to determine why a remote SMTP server rejects e-mail sent from your organization.What should you do？（）

• AReview the application event logs.
• BReview the message tracking logs.
• CSet the Protocol logging level to Verbose on the Receive connectors and then review the protocol log files.
• DSet the Protocol logging level to Verbose on the Send connectors and then review the protocol log files.