Which of the following features is used to generate spam on the Internet by spammers and
worms?

A.
AutoComplete

B.
SMTP relay

C.
Server Message Block (SMB) signing

D.
AutoFill

Explanation:

SMTP relay feature of e-mail servers allows them to forward e-mail to other e-mail servers.
Unfortunately, this feature is exploited by spammers and worms to generate spam on the Internet.