In addition to a self-selected domain, you can also freely define the e-mail address of your system. For this you need the following requirements:
- You are hosted in the Haiilo Cloud.
- You are in possession of the "Custom Domain" add-on.
- You are the owner of the desired email domain.
With these requirements in place and the permission status of a superadmin, you can set your custom email address within the administration (Administration >General Settings >Domain).
The email address must be a valid and public domain (at least an "A record", better an "MX record" accessible). It also needs a specific "SPF record".