A. It can drop the connection at the IP address level
B. It can block the e-mail based upon the sender ID
C. It can allow the e-mail and bypass all UTM inspection
D. It can allow the e-mail to be forwarded, but change the intended recipient to a new e-mail address
E. It can allow the e-mail to be forwarded to the destination, but tag it with a custom value in the subject line
参考答案：ABE
