What are the initial actions that can be performed on an incoming SMTP session by the
workqueue of a Cisco Email Security Appliance?

A.
Accept, Reject, Relay, TCPRefuse

B.
LDAP Verification, Envelope Sender Verification, Bounce Verification, Alias Table Verification

C.
Recipient Access Table Verification, Host DNS Verification, Masquerading, Spam Payload
Check

D.
SMTP Authentication, SBRS Verification, Sendergroup matching, DNS host verification