In many states sending spam is illegal. Thus, the spammers have techniques to try and ensure that no one knows they sent the spam out to thousands of users at a time. Which of the following best describes what spammers use to hide the origin of these types of e-mails?
A. A blacklist of companies that have their mail server relays configured to allow traffic only to their specific domain name.
B. Mail relaying, which is a technique of bouncing e-mail from internal to external mails servers continuously.
C. A blacklist of companies that have their mail server relays configured to be wide open.
D. Tools that will reconfigure a mail server’s relay component to send the e-mail back to the spammers occasionally.
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An open mail relay is a Simple Transfer Mail Protocol (SMTP) server, which is improperly configured and allows an unauthenticated relay of email. Spammers connect to the server and forge the sender information of the messages to use it to send an email.