Electronic mail is a method of exchanging messages ("mail") between people using electronic devices. Email was thus conceived as the electronic (digital) version of, or counterpart to, mail, at a time when "mail" meant only physical mail. Email later became a ubiquitous communication medium, to the point that in current use, an email address is often treated as a basic and necessary part of many processes in business, commerce, government, education, entertainment, and other spheres of daily life in most countries.
Spamming is the use of messaging systems to send multiple unsolicited messages (spam) to large numbers of recipients for the purpose of commercial advertising, for the purpose of non-commercial proselytizing, for any prohibited purpose, or simply repeatedly sending the same message to the same user. While the most widely recognized form of spam is email spam, the term is applied to similar abuses in other media: instant messaging spam, Usenet newsgroup spam, Web search engine spam, spam in blogs, wiki spam, online classified ads spam, mobile phone messaging spam, Internet forum spam, junk fax transmissions, social spam, spam mobile apps, television advertising and file sharing spam. It is named after Spam, a luncheon meat, by way of a Monty Python sketch about a restaurant that has Spam in almost every dish in which Vikings annoyingly sing "Spam" repeatedly.
Various anti-spam techniques are used to prevent email spam.
The Controlling the Assault of Non-Solicited Pornography And Marketing (CAN-SPAM) Act of 2003 is a law passed in 2003 establishing the United States' first national standards for the sending of commercial e-mail. The law requires the Federal Trade Commission (FTC) to enforce its provisions. Introduced by Republican Conrad Burns, the act passed both the House and Senate during the 108th United States Congress and was signed into law by President George W. Bush in December of 2003.
Mobile phone spam is a form of spam, directed at the text messaging or other communications services of mobile phones or smartphones. As the popularity of mobile phones surged in the early 2000s, frequent users of text messaging began to see an increase in the number of unsolicited commercial advertisements being sent to their telephones through text messaging. This can be particularly annoying for the recipient because, unlike in email, some recipients may be charged a fee for every message received, including spam. Mobile phone spam is generally less pervasive than email spam, where in 2010 around 90% of email is spam. The amount of mobile spam varies widely from region to region. In North America, mobile spam steadily increased after 2008 and accounted for half of all mobile phone traffic by 2019. In parts of Asia up to 30% of messages were spam in 2012.
Email spam, also referred to as junk email, spam mail, or simply spam, is unsolicited messages sent in bulk by email (spamming). The name comes from a Monty Python sketch in which the name of the canned pork product Spam is ubiquitous, unavoidable, and repetitive. Email spam has steadily grown since the early 1990s, and by 2014 was estimated to account for around 90% of total email traffic.
A Joe job is a spamming technique that sends out unsolicited e-mails using spoofed sender data. Early Joe jobs aimed at tarnishing the reputation of the apparent sender or inducing the recipients to take action against them, but they are now typically used by commercial spammers to conceal the true origin of their messages and to trick recipients into opening emails apparently coming from a trusted source.
Trespass to chattels is a tort whereby the infringing party has intentionally interfered with another person's lawful possession of a chattel. The interference can be any physical contact with the chattel in a quantifiable way, or any dispossession of the chattel. As opposed to the greater wrong of conversion, trespass to chattels is argued to be actionable per se.
Email marketing is the act of sending a commercial message, typically to a group of people, using email. In its broadest sense, every email sent to a potential or current customer could be considered email marketing. It involves using email to send advertisements, request business, or solicit sales or donations. Email marketing strategies commonly seek to achieve one or more of three primary objectives, to build loyalty, trust, or brand awareness. The term usually refers to sending email messages with the purpose of enhancing a merchant's relationship with current or previous customers, encouraging customer loyalty and repeat business, acquiring new customers or convincing current customers to purchase something immediately, and sharing third-party ads.
Email harvesting or scraping is the process of obtaining lists of email addresses using various methods. Typically these are then used for bulk email or spam.
A spamtrap is a honeypot used to collect spam.
A challenge–response system is a type of spam filter that automatically sends a reply with a challenge to the (alleged) sender of an incoming e-mail. It was originally designed in 1997 by Stan Weatherby, and was called Email Verification. In this reply, the purported sender is asked to perform some action to assure delivery of the original message, which would otherwise not be delivered. The action to perform typically takes relatively little effort to do once, but great effort to perform in large numbers. This effectively filters out spammers. Challenge–response systems only need to send challenges to unknown senders. Senders that have previously performed the challenging action, or who have previously been sent e-mail(s) to, would be automatically whitelisted.
Slamming Bill was a bill proposed in the United States Senate in 1998. It never passed. This bill is often mentioned by spammers in order to make a false impression that their spam is legal.
Register.com v. Verio, 356 F.3d 393, was a decision of the United States Court of Appeals for the Second Circuit that addressed several issues relevant to Internet law, such as browse wrap licensing, trespass to servers, and enforcement of the policies of the Internet Corporation for Assigned Names and Numbers (ICANN). The decision upheld the ruling of a lower court which prevented a provider of web development services from automatically harvesting publicly available registration data from a domain name registrar's servers for advertising purposes.
Contact scraping is the practice of obtaining access to a customer's e-mail account in order to retrieve contact information that is then used for marketing purposes.
Kleffman v. Vonage Holdings Corp., 232 P.3d 625, is a 2010 Supreme Court of California case certified by United States Court of Appeals for the Ninth Circuit. The decision ruled that sending unsolicited advertisement emails using multiple domain names was not unlawful under California Business and Professions Code section 17529.5, subdivision (a)(2), which made it unlawful to advertise in a commercial email advertisement that contained or was accompanied by falsified, misrepresented, or forged header information.
United States v. Kilbride, 584 F.3d 1240 is a case from the United States Court of Appeals for the Ninth Circuit rejecting an appeal from two individuals convicted of violating the Can Spam Act and United States obscenity law. The defendants were appealing convictions on 8 counts from the District Court of Arizona for distributing pornographic spam via email. The second count which the defendants were found guilty of involved the falsification of the "From" field of email headers, which is illegal to do multiple times in commercial settings under 18 USC § 1037(a)(3). The case is particularly notable because of the majority opinion on obscenity, in which Judge Fletcher writes an argument endorsing the use of a national community obscenity standard for the internet.
CompuServe Inc. v. Cyber Promotions, Inc. was a ruling by the United States District Court for the Southern District of Ohio in 1997 that set an early precedent for granting online service providers the right to prevent commercial enterprises from sending unsolicited email advertising - also known as spam - to its subscribers. It was one of the first cases to apply United States tort law to restrict spamming on computer networks. The court held that Cyber Promotions' intentional use of CompuServe's proprietary servers to send unsolicited email was an actionable trespass to chattels and granted a preliminary injunction preventing the spammer from sending unsolicited advertisements to any email address maintained by CompuServe.
Gordon v. Virtumundo, Inc., 575 F.3d 1040, is a 2009 court opinion in which the United States Court of Appeals for the Ninth Circuit addressed the standing requirements necessary for private plaintiffs to bring suit under the Controlling the Assault of Non-Solicited Pornography and Marketing Act of 2003, or CAN-SPAM Act of 2003, 15 U.S.C. ch. 103, as well as the scope of the CAN-SPAM Act's federal preemption. Prior to this case, the CAN-SPAM Act's standing requirements had not been addressed at the Court of Appeals level, and only the Fourth Circuit had addressed the CAN-SPAM Act's preemptive scope.
America Online, Inc. v. IMS, 24 F. Supp. 2d 548 was one of a series of legal battles America Online launched against junk e-mail. In this case, the court held that defendants' unauthorized mailing of unsolicited bulk e-mail constituted a trespass to chattels under Virginia state law.
