Filter the filename of the template HTML surrounding the response email. The PHP file will return the template in a variable called $template.

Allows site owners to not include IP addresses in the saved form response. The IP address is still used as part of spam filtering, if enabled, but it is removed when this filter is set to true before saving to the database and e-mailing the form recipients.

Filter the footer used in the response email.

This filter allows a site owner to customize the response to be emailed, by adding their own HTML around it for example.

Filter the title used in the response email.

Filter the contact form, allowing plugins to modify the HTML.

Allow customizing the email headers. Warning: DO NOT add headers or header data from the form submission without proper escaping and validation, or you’re liable to allow abusers to use your site to send spam. Especially DO NOT take email addresses from the form data to add as CC or BCC headers without strictly validating each address against a list of allowed addresses.