info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
type: reference, howto
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# Mailgun and GitLab **(FREE SELF)**
When you use Mailgun to send emails for your GitLab instance and [Mailgun](https://www.mailgun.com/)
integration is enabled and configured in GitLab, you can receive their webhook for
permanent invite email failures. To set up the integration, you must:
1. [Configure your Mailgun domain](#configure-your-mailgun-domain).