spam

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spam

Online Unsolicited, commercial bulk–junk E-mail. See Mail list, USENET.
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Because spamdexing can be so effective, the reach of backlash sites should not be underestimated: If properly coded, they will not necessarily wallow in obscurity.
A false drop can occur if the webpage found contains the keywords entered in the search, if the webpage is an attempt at spamdexing, if the search engine used has a fault in its database, or if it has a bug in the query program.
Botnets are exploited for various purposes,including denial-of-service attacks, creation or misuse of SMTP mail relays for spam (see Spambot), click fraud, mining bitcoins, spamdexing, and the theft of application serial numbers, login IDs, and financial informationsuch as credit card numbers.