Test WordPress Contact Form

Submits a TEST entry to a Contact Form 7 form through the plugin's own REST endpoint and reports what happened: mail_sent (the form works and WordPress sent the notification mail), mail_failed (the entry passed validation but WordPress could NOT send the mail, usually an SMTP/mail setup problem; this is also why a 'wpcf7mailsent' conversion never fires), validation_failed (with the fields that were rejected), or spam (a spam guard such as reCAPTCHA/Akismet blocked the test; real visitors may still get through). fields = {"field-name": "value"}; required fields left out are filled with obvious test values (test@example.com for email). A real submission sends a REAL e-mail to the form's recipient, so confirm=false (default) only previews the values that would be sent; confirm=true submits once.