Short for
Directory Harvest Attack, DHA is a type of
malicious
Internet attack where online spammers
collect valid
e-mail address and target those
addresses in a spam attack or sell the lists of valid e-mail addresses to
unscrupulous marketers. In a DHA attack, the spammer will select a domain name,
for example,
Webopedia.com. The spammer then sends an e-mail to any
possible addresses within that
domain name. If
the
e-mail server doe not reject the e-mail,
the spammer knows it is a valid e-mail address and adds it to his target list.
See grabber.
See also "Getting
Rid of Spam" and "All
About Spam, Spim and Spit" in the Did You Know section of Webopedia.
