correct STARTTLS syntax for email alerts?

[David Newman]

FreeBSD 11.2, monit-5.25.2 compiled from ports with SSL/TLS support

What's the correct syntax for monit to use STARTTLS when sending email
alerts?

Currently monit logs this error:

[PDT Jul 29 16:05:21] error    : Mail: Mailserver response error -- 530
5.7.0 Must issue a STARTTLS command first

Using this configuration in /usr/local/etc/monitrc:

set ssl options {
        version: auto
        verify: enable
        pemfile: /etc/ssl/certs/mail.example.com/everything.pem
}

set mailserver mail.example.com
        port 587
        username "address@hidden"
        password="wouldnt-you-like-to-know"
        using ssl

check process mailman with pidfile
/usr/local/mailman/data/master-qrunner.pid
        group mailman
        start program = "/usr/local/etc/rc.d/mailman start"
        stop program = "/usr/local/etc/rc.d/mailman stop"
        if 1 restarts within 1 cycles then alert

Thanks!

dn