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The format of an email address is local-part@domain, where the local-part may be up to 64 octets long and the domain may have a maximum of 255 octets. [5] The formal definitions are in RFC 5322 (sections 3.2.3 and 3.4.1) and RFC 5321—with a more readable form given in the informational RFC 3696 (written by J. Klensin, the author of RFC 5321) and the associated errata.
Some email address schemes described the path through multiple hosts needed to deliver email. This worked well only if the first host given in the path was sufficiently well known for the sender's system to be able to contact it. UUCP "bang path": reed!percival!bucket!lisag [5] (example on a business card)
For example, a Facebook user can link their email account to their Facebook to find friends on the site, allowing the company to collect the email addresses of users and non-users alike. [216] Over time, countless data points about an individual are collected; any single data point perhaps cannot identify an individual, but together allows the ...
Although the traditional format for email header section allows non-ASCII characters to be included in the value portion of some of the header fields using MIME-encoded words (e.g. in display names or in a Subject header field), MIME-encoding must not be used to encode other information in a header, such as an email address, or header fields like Message-ID or Received.
Meta Platforms, Inc., [9] doing business as Meta, [10] and formerly named Facebook, Inc., and TheFacebook, Inc., [11] [12] is an American multinational technology conglomerate based in Menlo Park, California. The company owns and operates Facebook, Instagram, Threads, and WhatsApp, among other products and services. [13]
Used when sending personal or informational email to a business email address. Immediate response not required. RR, meaning Reply Requested or Reply Required. The recipient is informed that they should reply to this email. RSVP, meaning Reply Requested, please, from the French Répondez s'il vous plaît. The recipient is informed that they ...
Facebook Query Language (FQL) is a query language that allows querying Facebook user data by using a SQL-style interface, [1] avoiding the need to use the Facebook Platform Graph API. [2] Data returned from an FQL query is in JSON format by default.
Facebook also said it was supporting an emerging encapsulation mechanism known as Locator/Identifier Separation Protocol (LISP), which separates Internet addresses from endpoint identifiers to improve the scalability of IPv6 deployments. "Facebook was the first major Web site on LISP (v4 and v6)", Facebook engineers said during their presentation.