Synopsis #
OpenBSD includes OpenSMTPD in the base system and provides additional mail transfer, access, and filtering software through packages. Internet mail service requires coordinated DNS, TLS, relay policy, mailbox storage, filtering, monitoring, abuse handling, backups, and upgrades.
The complete OpenSMTPD, Dovecot, and Rspamd guide provides one integrated system-user and Maildir deployment. The component pages provide focused reference material:
- OpenSMTPD covers the base-system mail transfer agent.
- Dovecot covers packaged IMAP, authentication, and mailbox access.
- Rspamd covers packaged message classification and filtering.
- Postfix covers the packaged Postfix mail transfer agent.
- Exim explains Exim’s absence from the OpenBSD 8.0 release packages and lists alternatives.
Package-specific paths and syntax must be checked against installation messages and the documentation installed with the current package.