### [wpforms_mailcheck_domains](https://wpforms.com/developers/wpforms_mailcheck_domains/)

**Published:** March 31, 2020
**Author:** Editorial Team

**Excerpt:** The wpforms_mailcheck_domains filter is used to add additional domains allowed inside the email suggestion on the WPForms Email form field. 

**Content:**

## Description

The `wpforms_mailcheck_domains` filter is used for adding additional domains inside the email suggestion on the WPForms **Email** form field.

## Parameters

$domains*(array)* Array of domain suggestions for the **Email** form field.## Source

`wpforms/src/Frontend/Frontend.php`

## More Information

The `wpforms_mailcheck_domains` is an array used for the email suggestion on the **Email** form field.

## Example

```

/**
 * List of domains for email suggestion.
 *
 * @link    https://wpforms.com/developers/wpforms_mailcheck_domains/
 *
 * @param   array   $domains  Array of domains for email suggestion.
 * @return  array
 */

function wpf_dev_mailcheck_domains( $domains ) {
 
    $domains[] = "domain.com";
 
    return $domains;
}
 
add_filter( 'wpforms_mailcheck_domains', 'wpf_dev_mailcheck_domains', 10, 1 );

```

## Reference Articles

[How to Add Domains to the Email Suggestion List](https://wpforms.com/developers/how-to-add-domains-to-the-email-suggestion-list/ "How to Add Domains to the Email Suggestion List")

**Categories:** Filters Hooks

**Tags:** PHP

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