![]() ![]() Code is designed to keep the memory, CPU and disk requirements as low as possible but it is admitted that large mail systems are not intended to be run on low-end machines, and trade-offs are made where higher memory usage would bring indisputable benefits. OpenSMTPD is an attempt by the OpenBSD team to produce an SMTP daemon implementation that is secure, reliable, high performance, simple to security audit and trivial to set up and administer. ![]() OpenSMTPD 6.6.2 was released to fix the vulnerability. On 28 January 2020, a vulnerability in OpenSMTPD was disclosed that could be remotely exploited to run arbitrary shell commands as root. As a result, OpenSMTPD 5.7.2 was released to address these issues. Version 5.4.4p1 was audited, and nine issues were found. On 2 October 2015, the results of a security audit were released. The first release shipped with OpenBSD 5.3. After a period of development, OpenSMTPD first appeared in OpenBSD 4.6. OpenSMTPD was designed to solve these problems and make mail exchanges accessible to a wider user-base. 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. The portable version was initiated by Charles Longeau and adds support for multiple operating systems including NetBSD, FreeBSD, DragonFly BSD, and several Linux distributions. 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 source code is available under the ISC license. Its design goals include security, reliability, ease of configuration, and support for common use cases. ![]() OpenSMTPD is primarily developed by Gilles Chehade, Eric Faurot and Charles Longeau as part of the OpenBSD project. It was publicly released on 17 March 2013 with version number 5.3, after being in development since late 2008. OpenSMTPD (also known as OpenBSD SMTP Server) is a Unix daemon implementing the Simple Mail Transfer Protocol to deliver messages on a local machine or to relay them to other SMTP servers. ![]()
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