ctrlpanel/app/Settings/MailSettings.php

<?php

namespace App\Settings;

use Spatie\LaravelSettings\Settings;

class MailSettings extends Settings
{
    public string $mail_host;

    public int $mail_port;

    public string $mail_username;

    public string $mail_password;

    public string $mail_encryption;

    public string $mail_from_address;

    public string $mail_from_name;

    public string $mail_mailer;

    public bool $mail_enabled;
    
    public static function group(): string
    {
        return 'mail';
    }

    public static function encrypted(): array
    {
        return [
            'mail_password'
        ];
    }
}