Thanks to this forum I've actually got cgi-email forms working.
The bad news is that I simply can't get required fields to work.
I've changed the template and HTML to [required-email], also tried [required_email], also tried with hidden inputs of "required" and "missing_fields_redirect"... No joy! Click <send> and it comes up with a "page not found" error. One combination came up with a cgi-email "no template variables" error.
The manual is less than helpful! Any suggestions?