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OpenSMTPD is a Unix system daemon implementing the Simple Mail Transfer Protocol to deliver messages on a local machine or to relay them to other SMTP servers. It has been released on the 17 March 2013 with version number 5.3 after being in development since late 2008. OpenSMTPD is primarily developed by Gilles Chehade, Eric Faurot and Charles Longeau as part of the OpenBSD project. Its design goals include being secure, reliable, easy to configure, supporting the most common use-cases and with source code that can be distributed under an ISC license. Its portable version, like that of OpenSSH, is developed as a child project which adds the portability code to the OpenBSD version and releases it separately. The portable version was initiated by Charles Longeau and adds supports for multiple operating systems including NetBSD, FreeBSD, DragonFlyBSD and several Linux distributions. ==History== The development of OpenSMTPD was motivated by a combination of issues with current SMTP daemons: difficult configuration, complicated and difficult to audit code, and unsuitable licensing.〔(【引用サイトリンク】title=OpenSMTPD Goals )〕 OpenSMTPD was designed to solve these problems and make mail exchanges accessible to a wider user-base. After a period of development, OpenSMTPD first appeared in OpenBSD 4.6.〔(【引用サイトリンク】title=OpenBSD 4.6 )〕 The first release shipped with OpenBSD 5.3.〔(【引用サイトリンク】title=OpenBSD 5.3 introduces stable SMTPD )〕〔(【引用サイトリンク】title=OpenSMTPD 5.3 released )〕〔(【引用サイトリンク】title=OpenBSD 5.3 )〕 On October 2nd, 2015, the results of a security audit were released. Version 5.4.4p1 was audited, and nine issues were found. As a result, OpenSMTPD 5.7.2 was released to address these issues.〔(【引用サイトリンク】title=Announce: OpenSMTPD 5.7.2 released )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OpenSMTPD」の詳細全文を読む スポンサード リンク
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