Using DMA under FreeBSD 14
FreeBSD 14 ships DMA (DragonFly Mail Agent) and uses it as a default
replacement for the venerable Sendmail.
The integration is seamless thanks to mailer.conf(5).
The FreeBSD Handbook provides a few hints on how to set it up with GMail and
FastMail. The latter happens to be my email provider of choice.
I could easily set up a smart host on my Raspberry.