Information AboutE-mail Address |
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An e-mail address, also known as an '''eddress''' (from ''electronic address''), identifies a location to which E-mail can be delivered. A modern Internet e-mail address (using SMTP or Usenet ) is a string of the form ''jsmith@example.com''. It should be read as "jsmith '''at''' example '''dot''' Com ". The part before the @ sign is the '''local-part''' of the address, often the Username of the recipient, and the part after the @ sign is a Domain Name which can be looked up in the Domain Name System to find the Mail Transfer Agent or Mail EXchangers (MXs) accepting e-mail for that address. OVERVIEW See Also: E-mail The domain name of an e-mail address is often that of the e-mail service, such as Microsoft's Hotmail or Google's Gmail . The domain name can be also the domain name of the company that the recipient represents or the domain of the recipient's Personal Site . Earlier forms of e-mail address included the somewhat verbose notation required by X.400 , and the UUCP "bang path" notation, in which the address was given in the form of a sequence of computers through which the message should be relayed. This latter was in wide use for several years, but was superseded by the generally more convenient SMTP form. Addresses found in the headers of e-mail should not be considered authoritative, because SMTP has no generally required mechanisms for Authentication . Forged e-mail addresses are often seen in Spam , Phishing , and similar scams, leading to several initiatives, which aim to make such forgeries easier to spot. To indicate where the e-mail should go, a user normally types the "display name" of the recipient followed by the address specification surrounded by angled brackets, for example "John Smith LIMITATIONS The format of Internet e-mail addresses is defined in RFC 2822, which permits only a subset of ASCII characters in e-mail addresses. As defined in RFC 2821, the local-part of an e-mail address allows up to 64 characters maximum and the Domain Name a maximum of 255 characters. The local-part "MUST BE treated as case sensitive. {Link without Title} However, exploiting the case sensitivity of mailbox local-parts impedes interoperability and is discouraged." According to RFC 2822, the local-part of the e-mail may use any of these ASCII characters:
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