Synopsis #
Exim is not included in the OpenBSD 8.0 ports tree or the official amd64 package set. Select an available mail transport such as OpenSMTPD or Postfix.
Installation #
There is no supported package installation procedure here for OpenBSD 8.0. Do not mix packages from another OpenBSD release. A separately maintained source build would need independent compatibility, security-update, and service-integration work.
Alternatives #
OpenBSD includes OpenSMTPD in base. Postfix is another documented option from packages. Select a supported daemon before migrating domains, mailboxes, authentication, or relay policy, and verify delivery in both directions before changing public MX records.