spam relay


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spam relay

Sending mail to a destination via a third-party mail server or proxy server in order to hide the address of the source of the mail. When email servers (SMTP servers) are used, it is known as an "open relay" or "SMTP relay," and this method was commonly used by spammers in the past when SMTP servers were not locked down. Today, most spam relay is provided by proxy servers and botnets. See spam, spam filter, botnet, open proxy server and MAPS.
References in periodicals archive ?
Backdoors allow hackers to download any program they choose, including those that steal personal information, to turn the PCs into spam relay points, or create foot soldiers to carry out other Internet attacks.
These not only allow the competitors to compete in such events as the Spam Toss, the Spam Cram and the Spam Relay, but also provide the justification for me putting this in my column.
It can spread via network shares and email, usually requiring an absentminded user to actually open an attachment, and installs malicious backdoor and spam relay software on the infected machine.