‚ÄčOur plugin is using wordpress mail processing, so it just sends a request to wordpress to send email on behalf of the plugin and wordpress should send email using the mail server that you have setup on your hosting. If you don’t have email server setup – you can use free service like SendGrid (https://sendgrid.com) or any similar service and install their WordPress plugin (https://wordpress.org/plugins/sendgrid-email-delivery-simplified/) which will send emails on your behalf, it is a better way than just use your regular hosting because SendGrid gives you ability to track emails you send