SENDMAIL

Domain	Definition
Computing	Sendmail The BSD Unix Message Transfer Agent supporting mail transport via TCP/IP using SMTP. Sendmail is normally invoked in the background via a Mail User Agent such as the mail command. Sendmail was written by Eric Allman at the University of California at Berkeley during the late 1970s. He now has his own company, Sendmail Inc. Sendmail was one of the first programs to route messages between networks and today is still the dominant e-mail transfer software. It thrived despite the awkward ARPAnet transition between NCP to TCP protocols in the early 1980s and the adoption of the new SMTP Simple Mail Transport Protocol, all of which made the business of mail routing a complex challenge of backward and forward compatibility for several years. There are now over one million copies of Sendmail installed, representing over 75% of all Internet mail servers. Simultaneously with the announcement of the company in November 1997, Sendmail 8.9 was launched, featuring new tools designed to limit junk e-mail. SendMail 8.9 is still distributed as source code with the rights to modify and distribute. Latest version: 8.9.1, as of 1998-08-25. The command sendmail -bv ADDRESS can be used to learn what the local mail system thinks of ADDRESS. You can also talk to the Sendmail daemon on a remote host FOO with the command telnet FOO 25 (1998-08-25). Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

Specialty Definition: Sendmail

Sendmail is an open source mail transfer agent (MTA): a computer program for the routing and delivery of email.

A descendant of the original ARPANET delivermail application, sendmail is a remarkably flexible program, supporting many kinds of mail transfer and delivery including the overwhelmingly popular SMTP. The original version of Sendmail was written by Eric Allman in the early 1980s at UC Berkeley, who had also written delivermail previously.

Sendmail has been widely criticized as slow, overcomplicated, and difficult to maintain by comparison with other MTAs such as Qmail and Postfix. Nevertheless it remains the most popular MTA on the Internet, a fact almost certainly due in part to its position as the standard MTA under most variants of the Unix operating system. According to one study, as of November 2001 approximately 42% of the publicly reachable mail servers on the Internet were running sendmail on some form of Unix system.

Sendmail is often run as the root user, representing a severe security threat if compromised. This is despite the recommendation since 2001 by its authors that it be run as an unprivileged user.

In March 2003, reports of a new security vulnerability in sendmail have been circulating, together with proof-of-concept exploit code. This raises fears of an imminent new Internet worm problem, unless existing vulnerable implementations are patched in time.

References

Daniel J. Bernstein, Internet host SMTP server survey, November 2001
Mike Brodbelt, A brief history of mail
Sendmail Configuration howto, Sendmail Configuration and Building a sendmail.cf file
Marco D'itri, Sendmail considered harmful (Italian; babelfish)
Sendmail Consortium, sendmail.org
Sendmail, Inc., sendmail.com

Commercial Usage: SENDMAIL

Domain	Title
Books	Sendmail and Mail Systems (reference) Sendmail Desktop Reference (reference) Sendmail for Linux (reference) Sendmail Performance Tuning (reference) Sendmail, 3rd Edition (reference) (more book examples)
Source: compiled by the editor from various references; see credits.

Expression: SENDMAIL

Frequency of Internet Keywords: SENDMAIL

Anagrams: SENDMAIL

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "a-d-e-i-l-m-n-s"
	-1 letter: denials, maidens, malines, medials, medians, medinas, menials, mildens, misdeal, mislead, seminal, sideman, snailed.
	-2 letters: aidmen, aisled, aliens, alined, alines, amends, amides, amines, animes, daimen, damsel, deasil, denial, denims, desman, dismal, elains, elands, emails, ideals, inseam, island, ladens, ladies, lameds, lemans, lianes, limans, limens, limned, maiden, mailed, mailes, maline, medals, medial, median, medias.
	Words containing the letters "a-d-e-i-l-m-n-s"
	+1 letter: dismantle, landmines, mandibles, melanoids, mishandle.
	+2 letters: almandines, almandites, amplidynes, dentaliums, dismalness, dismantled, dismantles, madeleines, madrilenes, mandolines, medaillons, medallions, medicinals, misaligned, misdealing, mishandled, mishandles, misleading, mislearned, misplanned, misplanted, nialamides, normalised.
	+3 letters: delaminates, derailments, dimensional, disablement, endoplasmic, mainlanders, mediastinal, meridionals, mineralised, misbalanced, mispleading, palindromes, semidiurnal, streamlined, sulfonamide, timberlands.
	+4 letters: anecdotalism, blandishment, declamations, descrambling, detrimentals, dilettantism, diminishable, disablements, dismalnesses, displacement, inadmissible, legerdemains, maidenliness, maledictions, malnourished, manifoldness, masculinised, masculinized, mendaciously, mischanneled, misleadingly, salamandrine, sedimentable, sulfonamides.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.

Alternative Orthography: SENDMAIL

Hexadecimal (or equivalents, 770AD-1900s) (references)

53 45 4E 44 4D 41 49 4C

Leonardo da Vinci (1452-1519; backwards) (references)

American Sign Language (origins from 1620-1817 in Italy and, especially, France) (references)

⁼

Semaphore (1791, in France) (references)

Braille (1829, in France) (references)

Morse Code (1836) (references)

... . -. -.. -- .- .. .-..

Dancing Men (Sir Arthur Conan Doyle, 1903) (references)

Binary Code (1918-1938, probably earlier) (references)

01010011 01000101 01001110 01000100 01001101 01000001 01001001 01001100

HTML Code (1990) (references)

&#83 &#69 &#78 &#68 &#77 &#65 &#73 &#76

ISO 10646 (1991-1993) (references)

0053 0045 004E 0044 004D 0041 0049 004C

British Sign Language (Fingerspelling, BSL; 1992, British Deaf Association Dictionary of British Sign Language) (references)

Encryption (beginner's substitution cypher): (references)

Expression	Frequency per Day	Expression	Frequency per Day
sendmail	287	sendmail anti virus	6
buffer exploit overflow sendmail	65	exploit sendmail	6
sendmail for window	26	php sendmail	5
sendmail xp	15	sendmail starttls	5
sendmail configuration	14	attachment sendmail	5
script sendmail	13	open sendmail source	5
perl sendmail	12	configure gui sendmail	5
configure sendmail	11	nt sendmail	5
sendmail tutorial	10	access sendmail	5
configuring sendmail	10	sendmail spam	5
sendmail.cf	9	connection refused sendmail	4
linux sendmail	9	alias sendmail	4
sendmail command	7	relay sendmail	4
howto sendmail	7	attach file sendmail	4
manual sendmail	7	analyzer log sendmail	4
unix sendmail	7	sendmail help	4
cgi sendmail	6	procmail sendmail	4
sasl sendmail	6	config sendmail	4
download sendmail	6	sendmail spamassassin	4
sendmail setup	6	log sendmail	3
		open sendmail ssl	3
Source: compiled by the editor from various references; see credits.

Expression using "SENDMAIL": sendmail Inc.. Additional references.
Source: compiled by the editor from various references; see credits.

SENDMAIL

Specialty Definition: SENDMAIL

Specialty Definition: Sendmail

Crosswords: SENDMAIL