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Sendmail originated in the early days of the Internet, an era when considerations of security did not play a primary role in the development of network software.
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Sendmail and early
He wrote Sendmail as a derivative of delivermail in the early 1980s at UC Berkeley.
Sendmail and Internet
Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and-delivery methods, including the Simple Mail Transfer Protocol ( SMTP ) used for email transport over the Internet.
In 2001, approximately 42 % of the publicly-reachable mail-servers on the Internet ran Sendmail.
Sendmail soon became an important part of the Berkeley Software Distribution ( BSD ) and continues to be the most widely used MTA on Unix based systems today, despite its somewhat complex configuration syntax and frequent abuse by Internet telemarketing firms.
Sendmail and when
In the mid 2000s, UUCP over TCP / IP ( often encrypted, using the SSH protocol ) was proposed for use when a computer does not have any fixed IP addresses but is still willing to run a standard mail transfer agent ( MTA ) like Sendmail or Postfix.
Sendmail and security
Early versions of Sendmail suffered from a number of security vulnerabilities that have been corrected over the years.
Sendmail itself incorporated a certain amount of privilege separation in order to avoid exposure to security issues.
, current versions of Sendmail, like other modern MTAs, incorporate a number of security improvements and optional features that can be configured to improve security and help prevent abuse.
The most popular predecessor to qmail, Sendmail, was not designed with security as a goal, and as a result has been a perennial target for attackers.
Sendmail and did
qmail was not designed to replace Sendmail, and does not behave exactly as Sendmail did in all situations.
Sendmail and development
However, the development of Sendmail X was stopped in favor of a new project called MeTA1.
* Sendmail ( Under development )
Sendmail and software
A descendant of the delivermail program written by Eric Allman, Sendmail is a well-known project of the free and open source software and Unix communities.
qmail was designed as a pointed response to Sendmail, an extremely popular and somewhat beloved piece of Unix software.
Sendmail and .
More recent surveys have suggested a decline, with 29. 4 % of mail servers in August 2007 detected as running Sendmail in a study performed by E-Soft, Inc. Sendmail is trailed by Microsoft Exchange Server, Exim, and Postfix ; these four being the only mail servers with more than 10 % of the total.
Allman designed Sendmail to incorporate great flexibility, but it can be daunting to configure for novices.
Sendmail supports a variety of mail transfer protocols, including SMTP, ESMTP, DECnet's Mail-11, HylaFax, QuickPage and UUCP.
Additionally, Sendmail v8. 12 introduced support for milters-external mail filtering programs that can participate in each step of the SMTP conversation.
The next generation of Sendmail was initially called Sendmail X, previously it was called Sendmail 9, but it does not derive from the Sendmail version 8 code base.
The first release of Sendmail X ( smX-0. 0. 0. 0 ) was made available on October 30, 2005.
The final release was smX-1. 0. PreAlpha7. 0., released on May 20, 2006 under the same license used by Sendmail 8.
originated and early
Axenthof Thiad originated in the early 1990s as the Fresena Thiad and part of the Winland Rice.
Instead, the phrase appears to have originated in the early 19th century United States ( particularly in the sense " pull oneself over a fence by one's bootstraps "), to mean an absurdly impossible action, an adynaton.
The oldest musical tradition which fits under the label of Celtic fusion originated in the rural American south in the early colonial period and incorporated Scottish, Scots-Irish, Irish, English, and African influences.
Albert Ellis ' system, originated in the early 1950s, was first called rational therapy, and can ( arguably ) be called one of the first forms of cognitive behavioral therapy.
" Shag " itself ( when used in reference to American social dances ) is a very broad term used to denote a number of swing dances that originated during the early part of the 20th century.
Proto-Chadic language is believed * to have originated in Asia before it entered Africa as early as 7 kya, probably before or after the First Egyptian Dynasty.
He said that Dianetics " forms a bridge between " cybernetics and General Semantics ( a set of ideas about education originated by Alfred Korzybski, which received much attention in the science fiction world in the 1940s ) — a claim denied by scholars of General Semantics, including S. I. Hayakawa, who expressed strong criticism of Dianetics as early as 1951.
The custom of the Easter egg originated amongst the early Christians of Mesopotamia, who stained eggs red in memory of the blood of Christ, shed at his crucifixion.
Other eukaryotic organelles may have also evolved through endosymbiosis ; it has been proposed that cilia, flagella, centrioles, and microtubules may have originated from a symbiosis between a Spirochaete bacterium and an early eukaryotic cell, but this is not widely accepted among biologists.
Futurism was an artistic and social movement that originated in Italy in the early 20th century.
The greasepaint mustache and eyebrows originated spontaneously prior to a vaudeville performance in the early 1920s when he did not have time to apply the pasted-on mustache he had been using ( or, according to his autobiography, simply did not enjoy the removal of the mustache every night because of the effects of tearing an adhesive bandage off the same patch of skin every night ).
Yahweh, later the national god of both Israel and Judah seems to have originated in Edom and Midian in southern Canaan, and may have been brought north to Israel by the Kenites and Midianites at an early stage.
William Fairfield Warren, in his book, Paradise Found: The Cradle of the Human Race at the North Pole presented his belief that humanity had originated on a continent in the Arctic, called Hyperborea, this view influenced some of the early hollow earth theorists.
Hyenas originated in the jungles of Miocene Eurasia 22 million years ago, when most early feliform species were still largely arboreal.
House music is a genre of electronic dance music that originated in the American city of Chicago in the early 1980s.
In Western culture, the custom of a newlywed couple going on a holiday together originated in early 19th century Great Britain, a concept borrowed from the Indian elite, in the Indian Subcontinent.
The early hacker culture and resulting philosophy originated at the Massachusetts Institute of Technology ( MIT ) in the 1950s and 1960s.
The counties of Antrim and Down originated early in the 16th century.
The sayings are most often harmonizations of Matthew and Luke that appear to be grouped together topically and organized into sayings collections, including material that probably originated from an early Christian catechism.
The term originated in relation to Celtic structures, typically pre-Christian, but in antiquarian scholarship of the 19th and early 20th centuries it was sometimes applied to similar structures outside the Celtic world.
It is not known how the name " knapsack problem " originated, though the problem was referred to as such in the early works of mathematician Tobias Dantzig ( 1884 – 1956 ), suggesting that the name could have existed in folklore before a mathematical problem had been fully defined.
Language is thought to have originated when early hominins first started cooperating, gradually changing their primate communication systems as they acquired the ability to form a theory of other minds and shared intentionality.
The Arabs had become familiar with the game as early as the eighth century when the Islamic empire conquered Persia, where the game of chess was alleged to have been originated.
The extremely early date of activity at Lykaion could suggest that these customs originated there.
Modern manga originated in the Occupation ( 1945 – 1952 ) and post-Occupation years ( 1952 – early 1960s ), while a previously militaristic and ultra-nationalist Japan rebuilt its political and economic infrastructure.
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