# Special fields

Part of the sendm8 docs: https://sendm8.com/docs#fields. Index for AI assistants: https://sendm8.com/llms.txt

A few field names starting with an underscore change how a submission is handled. They match Formspree’s, so if you’re moving over, changing the URL is the only edit you need. Underscore fields are used and then removed: they aren’t stored with the submission.

| Field | Also accepts | What it does |
| --- | --- | --- |
| `_replyto` | `email` | Sets Reply-To on the notification email, so hitting reply answers the person who wrote in. Must be a valid address. |
| `_subject` | None | The subject line of the notification email. |
| `_next` | `_redirect` | Where to send the visitor after a normal form post. Must be on one of the form’s allowed domains. [Redirects](https://sendm8.com/docs/redirects). |
| `_gotcha` | `_honeypot` | A hidden honeypot. If it has anything in it, the submission is treated as spam. [Spam protection](https://sendm8.com/docs/spam). |
| `_cc` | None | Extra recipients, comma-separated. Only addresses you’ve verified in your account get a copy, so it can’t be used to email strangers. |

`contact.html`

```html
<form action="https://sendm8.com/f/k3x9q2m7ab" method="POST">
  <input type="hidden" name="_subject" value="New enquiry from the website">
  <input type="hidden" name="_next" value="https://yourstudio.com/thanks">
  <input type="hidden" name="_cc" value="team@yourstudio.com">
  <input type="text" name="_gotcha" style="display:none" tabindex="-1" autocomplete="off">

  <label>Your email <input name="_replyto" type="email" required></label>
  <label>Message <textarea name="message"></textarea></label>
  <button>Send</button>
</form>
```