Oh, there's a much way to get the debug output, which is to add &debug=true to the URL.
curl 'localhost:9115/probe?target=smtp.google.com:25&module=smtp_starttls&debug=true' -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/3fab84ce-2dcc-4a23-8de0-c2d094d51769o%40googlegroups.com.
