Synopsis # OpenSMTPD is the default mail transfer agent (MTA) in OpenBSD. It is implemented as the smtpd(8) daemon and designed to be secure, simple, and suitable for many use cases including local delivery, relaying, authenticated submission, and receiving mail for virtual domains. This chapter describes how to configure smtpd(8) for common and advanced scenarios, including TLS, filtering, and support for additional modules via opensmtpd-extras. Features # Secure by default, with privilege s...
