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Web Design Glossary
Spam
Email spam, or junk mail, is a broad term for any unsolicited email. Most spam schemes involve the same email being sent to thousands of recipients; for this reason, it is sometimes called unsolicited bulk email (UBE). Billions of spam emails are sent every day.
Spam may contain attachments which harbour viruses or worms. Spamming is also a very cheap way of advertising, and often niche products such as prescription pharmaceuticals are advertised. Spam may also contain fraudulent material which is designed to trick the recipient into giving away personal details such as passwords or credit card numbers. The practice of sending such mail is known as phishing.
The sending of spam is prohibited in the terms of service of internet service providers (ISPs). Spamming is also illegal in some parts of the world, but tracking down those who are responsible for sending spam email is extremely difficult, as they often hijack others' computers and servers, using malware programs called bots
, in order to send their messages. These hijacked computers are called zombies
, and about 80% of spam is sent through them. Spam is a global problem, and puts a great strain on the electronic resources of large businesses in particular.
The problem of an inbox clogged with spam can be dealt with, at least in part, by various software measures, including the many kinds of spam filters, and black and white lists (sometimes called allow and deny lists). It is also possible to protect your email address from being added to spammers' lists, by avoiding posting it in its full form on the Internet, and by avoiding opening or responding to spam emails.
Spam - Spam Bayesian Statistical Analysis Heuristics Rules-Based Analysis Distributed Checksum Clearinghouses Black and White Lists HTML Shield Technology Allow List Deny Delivery Junk Mail
Tag Subject Prepend Spam Virus Worm Phishing
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