Email Spam is a Form of net abuse, in which messaging systems indiscriminately send unsolicited bulk messages .
Also known as unsolicited bulk Email (UBE) or unsolicited commercial email (UCE), is the practice of sending unwanted e-mail messages, frequently with commercial content, in large quantities to an indiscriminate set of recipients.
Since , e-mail is an extremely cheap mass medium, and professional spammers have automated their processes to the extent that millions of messages can be sent daily with little or no labor costs.
Thus, spamming can be very profitable even at what would otherwise be considered extremely low response rates.
Increasingly, e-mail spam today is sent via "zombie networks", networks of virus- or worm-infected personal computers in homes and offices around the globe; many modern worms install a backdoor which allows the spammer access to the computer and use it for malicious purposes.
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