# Email subject line

> Formspree Docs · Building Your Form · Updated December 10, 2025

#### Available on: All plans

To customize the submission email subject line, add an input with the name `subject` This will let you reply to submissions without having to edit the subject line each time. Here's an example: 

```html
<input name="subject" value="Need help with order" />
```

#### Unique subjects

If you'd like to customize your subject based on your submission's contents you can do so using a hidden input field and use _variables_ from your submission. To add a variable, use the following syntax: `{{ variable_name }}` in your subject value.

For instance, if you had a field named `name` and you'd like to have all subjects come in as "New submission from _name_", you can do this like so:

```html
<input name="subject" type="hidden" value="New submission from {{ name }}" />
```