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Sendmail
Developed by Sendmail Consortium, Sendmail, Inc. A software developer is a person or organization concerned with facets of the software development process wider than design and coding a somewhat broader scope of
Latest release 8.14.3 / May 3, 2008
Preview release MeTA1-1.0.PreAlpha22.0
OS Cross-platform
Genre Mail transfer agent
License Sendmail License
Website http://www.sendmail.org/

Sendmail is a mail transfer agent (MTA) that is a well-known project of the open source, free software and Unix communities, which is distributed both as free software and proprietary software. A software release is the distribution whether public or private of an initial or new and upgraded version of a Computer software product Events 1491 - Kongo monarch Nkuwu Nzinga is baptised by Portuguese missionaries adopting the baptismal name of João 2008 ( MMVIII) is the current year in accordance with the Gregorian calendar, a Leap year that started on Tuesday of the Common A software release is the distribution whether public or private of an initial or new and upgraded version of a Computer software product An operating system (commonly abbreviated OS and O/S) is the software component of a Computer system that is responsible for the management and coordination In computing cross-platform (also known as multi-platform) is a term used to refer to Computer software or computing methods and concepts that are implemented Computer software can be organized into categories based on common function type or field of use A mail transfer agent (MTA (also called a mail transport agent, message transfer agent, or smtpd (short for SMTP daemon) is a A software license (or software licence in commonwealth usage is a Legal instrument governing the usage or redistribution of copyright protected software A website (alternatively web site or Web site, a back-construction from the Proper noun World Wide Web) is a collection of Web pages A mail transfer agent (MTA (also called a mail transport agent, message transfer agent, or smtpd (short for SMTP daemon) is a The free software community is an informal term referring to the users and developers of Free software as well as supporters of the Free software movement. The free software community is an informal term referring to the users and developers of Free software as well as supporters of the Free software movement. Unix (officially trademarked as UNIX, sometimes also written as Unix with Small caps) is a computer Free software or software libre is Software that can be used studied and modified without restriction and which can be copied and redistributed in modified or unmodified Proprietary software is Computer software on which the producer has set restrictions on use private modification copying, or republishing.

Contents

History and use

A descendant of the original ARPANET delivermail program, Sendmail is remarkably flexible, supporting many kinds of mail transfer and delivery including the overwhelmingly popular SMTP. The ARPANET ( Advanced Research Projects Agency Network) developed by ARPA of the United States Department of Defense, was the world's first operational The ancestor of Sendmail, delivermail used the FTP protocol on the early ARPANET to transmit E-mail to the recipient Simple Mail Transfer Protocol ( SMTP) is a De facto standard for electronic mail (e-mail transmissions across the Internet. The original version of Sendmail was written by Eric Allman in the early 1980s at UC Berkeley, who had also written delivermail previously. Eric Paul Allman (born 1955 is a computer programmer who developed Sendmail and its precursor Delivermail in the late 1970s and early 1980s at UC Berkeley The 1980s was the decade spanning from January 1 1980 to December 31 1989. The University of California Berkeley (also referred to as Cal, Berkeley and UC Berkeley) is a major research university located in Berkeley The ancestor of Sendmail, delivermail used the FTP protocol on the early ARPANET to transmit E-mail to the recipient Delivermail was shipped in 1979 with 4. The ancestor of Sendmail, delivermail used the FTP protocol on the early ARPANET to transmit E-mail to the recipient 0 and 4. 1 BSD. Sendmail was shipped with BSD 4. 1c in 1983 (the first BSD version to include TCP/IP).

Sendmail remains the most popular MTA on the Internet. Its popularity is due in part to its position as the standard MTA under most variants of the Unix operating system. Unix (officially trademarked as UNIX, sometimes also written as Unix with Small caps) is a computer According to latest D. J. Bernstein SMTP survey[1], as of November 2001 approximately 42% of the publicly reachable mail servers on the Internet were running Sendmail. Year 2001 ( MMI) was a Common year starting on Monday according to the Gregorian calendar. 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. [2] Sendmail is trailed by Microsoft Exchange Server, Exim, and Postfix, these four being the only mail servers with more than 10% of the installed base. Microsoft Exchange Server is a Messaging and Collaborative software product developed by Microsoft. Exim is a Mail transfer agent (MTA used on Unix-like operating systems Postfix is a free open source Mail transfer agent (MTA a Computer program for the routing and delivery of Email.

As Sendmail is a complex package with a great deal of functionality, it can be difficult for an unaccustomed system administrator to configure. Documentation of the Sendmail system has not always kept pace with changes to the administrative interfaces; despite the availability of macro-based configuration tools, many support websites instruct administrators to directly modify configuration files that should instead be managed by administrative tools. The failure of vendors to update their support materials contributes to the perception of Sendmail as a difficult-to-configure package.

The complexity of Sendmail does provide benefits, in the form of flexibility and scalability. Sendmail supports a variety of mail transfer protocols, including SMTP, ESMTP, DECnet's mail11, HylaFax, QuickPage and UUCP. Simple Mail Transfer Protocol ( SMTP) is a De facto standard for electronic mail (e-mail transmissions across the Internet. Extended SMTP (ESMTP sometimes referred to as Enhanced SMTP, is a definition of protocol extensions to the Simple Mail Transfer Protocol standard UUCP is an Abbreviation for Unix to Unix CoPy. The term generally refers to a suite of Computer programs and protocols allowing remote execution Additionally, Sendmail v8. 12 as of September 2001 introduced support for milters - external mail filtering programs that can participate in each step of the SMTP conversation. Year 2001 ( MMI) was a Common year starting on Monday according to the Gregorian calendar. A milter ( Portmanteau for mail filter) is an extension to the widely used open source Mail transfer agents (MTA Sendmail and Postfix Simple Mail Transfer Protocol ( SMTP) is a De facto standard for electronic mail (e-mail transmissions across the Internet.

Security

Sendmail originated in the early days of the modern Internet, an era when security was not a primary consideration in the development of network software. 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. In Computer programming and Computer security, privilege separation is a technique in which a program is divided into parts which are limited to the specific 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.

Sendmail X / MeTA1

The next generation of Sendmail was initially called Sendmail X (previously it was called Sendmail 9, but is not an evolution of the Sendmail version 8 code base). However, the development of Sendmail X was stopped in favor of a new project called MeTA1.

The first release of Sendmail X (smX-0.0.0.0) was made available on October 30, 2005. Events 637 - Antioch surrenders to the Muslim forces under Rashidun Caliphate after the Battle of Iron bridge. Year 2005 ( MMV) was a Common year starting on Saturday (link displays full calendar of the Gregorian calendar. The final release was smX-1.0.PreAlpha7.0., released on May 20, 2006 under the same license used by Sendmail 8. Events 325 - The First Council of Nicaea &ndash the first Ecumenical Council of the Christian Church is held Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar.

Development on MeTA1 continues, with the released code at the pre-alpha stage as of January 2008. A software release is the distribution whether public or private of an initial or new and upgraded version of a Computer software product

Sendmail-8

Releases

The information is based on RELEASE_NOTES file from sendmail distribution.

History of Vulnerabilities

Sendmail vulnerabilities in CERT advisories and alerts.

See also

References

External links

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