You are a messaging administrator for a company named Contoso, Ltd. Contoso has a UNIX-based
email system for the contoso.com SMTP domain. Contoso has a perimeter network and an internal
network.
Corporate security policy states that only TCP port 25 is allowed from the perimeter network to the
internal network.
You plan to change the UNIX-based email infrastructure to Exchange Server 2010 Service Pack 1
(SP1). The UNIX-based infrastructure will not coexist with the Exchange Server 2010 SP1
organization.
Contoso has a partner company named Fabrikam, Inc. All recipients at Fabrikam are hosted on an
Exchange Server 2003 organization. Fabrikam uses the fabrikam.com SMTP domain.
You need to plan the configuration of the Exchange Server 2010 SP1 accepted domains to meet the
following requirements:
• Ensure that all email messages sent to Contoso and Fabrikam can be received by the Contoso
servers.
• Ensure that the Contoso servers can then relay the email messages to the Fabrikam servers.
• Prevent email messages sent to Fabrikam recipients from being relayed to the internal network.
What should you include in the plan? (Each correct answer presents part of the solution. Choose all
that apply.)

A.
an authoritative accepted domain for contoso.com

B.
an internal relay accepted domain for fabrikam.com

C.
an authoritative accepted domain for fabrikam.com

D.
an external relay accepted domain for contoso.com

E.
an external relay accepted domain for fabrikam.com

Explanation: