What customer information is needed for Cisco Unified MeetingPlace Express SMTP e-mail integration?

A.
an SMTP e-mail server IP address and host name if the customer has more than one SMTP e-mail server, and a second IP address and host name for redundancy

B.
an SMTP e-mail server host name only, DNS configured to resolve the name, and only one connection to an e-mail server

C.
an SMTP e-mail server IP address and host name, a user account and password for authentication, and a second IP address and host name for redundancy

D.
an SMTP e-mail IP address, and Cisco UnifiedCallManager IP address or host name with AXL/SOAP user ID and password