sendmailgoes, it works out of the box. And I like getting the reports on a local mail spool, as they can be dealt with individually with a simple mail reader like
mutt. Boosting up the configuration to work as a incoming/outgoing MTA is, for the most part, adding
pkg install openssl/libresslas the first step in a freshly installed system to get those working but as it happens pkg(8) itself relies on SSL/TLS...