Set result from hook wpcf7_mail_sent

Hi,

I was looking into “how do I sent the form to an own service” and realized it the following way:

add_action( 'wpcf7_mail_sent', 'wpcf7_mail_sent_function' );

function wpcf7_mail_sent_function( $contact_form ) {

    // Avoid sending an email
    $contact_form->skip_mail = true;

    // With the title I could do some check for the form...
    $title = $contact_form->title();

    // Get the form data
    $submission = WPCF7_Submission::get_instance();
    $formData= $submission->get_posted_data();

    // Now do some things with the form data
    / ...

    return false;
}

Now, when I add the form to some page and fill it, I always get this answer:

{"mailSent":true,"into":"#wpcf7-f6-p2-o1","captcha":null,"message":"Thank you for your message. It has
 been sent."}

Well always means of course if I pass a valid email etc. but I really wonder how to influence the response message and mailSent attribute based on some own logic (e.g. considering the response of my webservice), which tells me if something is wrong.

I tried very hard to work with some filters like wpcf7_form_response_output but wasn’t really able to get it working and I also did not find any working example that changed the result. Probably there are a lot of modules where I could look into but I tried and did not suceed so far, maybe I can get an idea here.

Thank’s in advance,
Marcus

https://ww.wp.xz.cn/plugins/contact-form-7/