OpenSMTPD

OpenSMTPD is a secure SMTP server implementation from the OpenBSD project. It provides an open source implementation of an SMTP server, making it relevant to people and organizations that need software for operating an SMTP server and prefer a project developed within OpenBSD. The available information identifies its purpose specifically as SMTP server implementation and describes it as secure, but does not provide further details about features, supported environments, configuration, administration, or deployment requirements. No particular paid product is identified as the software that OpenSMTPD replaces, so it should not be presented as a direct substitute for a named commercial SMTP server. Likewise, the available facts do not specify a technical limitation or a concrete difference from any paid product. Prospective users therefore need to consult the OpenSMTPD project’s documentation to evaluate details beyond its stated role as a secure SMTP server implementation from OpenBSD.