diff --git a/doc/sphinx-guides/source/admin/index.rst b/doc/sphinx-guides/source/admin/index.rst
index 6ff611cb55f..55733ffd99a 100755
--- a/doc/sphinx-guides/source/admin/index.rst
+++ b/doc/sphinx-guides/source/admin/index.rst
@@ -26,6 +26,7 @@ This guide documents the functionality only available to superusers (such as "da
    dataverses-datasets
    solr-search-index
    ip-groups
+   mail-groups
    monitoring
    reporting-tools-and-queries
    maintenance
diff --git a/doc/sphinx-guides/source/admin/mail-groups.rst b/doc/sphinx-guides/source/admin/mail-groups.rst
new file mode 100644
index 00000000000..a7d15af52b4
--- /dev/null
+++ b/doc/sphinx-guides/source/admin/mail-groups.rst
@@ -0,0 +1,82 @@
+Mail Domain Groups
+==================
+
+Groups can be defined based on the domain part of users (verified) email addresses. Email addresses that match
+one or more groups configuration will add the user to them.
+
+Within the scientific community, in many cases users will use a institutional email address for their account in a
+Dataverse installation. This might offer a simple solution for building groups of people, as the domain part can be
+seen as a selector for group membership.
+
+Some use cases: installations that like to avoid Shibboleth, enable self sign up, offer multi-tenancy or can't use
+:doc:`ip-groups` plus many more.
+
+.. hint:: Please be aware that non-verified mail addresses will exclude the user even if matching. This is to avoid
+          privilege escalation.
+
+Listing Mail Domain Groups
+--------------------------
+
+Mail Domain Groups can be listed with the following curl command:
+
+``curl http://localhost:8080/api/admin/groups/domain``
+
+Listing a specific Mail Domain Group
+------------------------------------
+
+Let's say you used "domainGroup1" as the alias of the Mail Domain Group you created below.
+To list just that Mail Domain Group, you can include the alias in the curl command like this:
+
+``curl http://localhost:8080/api/admin/groups/domain/domainGroup1``
+
+
+Creating a Mail Domain Group
+----------------------------
+
+Mail Domain Groups can be created with a simple JSON file:
+
+.. code-block:: json
+   :caption: domainGroup1.json
+   :name: domainGroup1.json
+
+    {
+      "name": "Users from @example.org",
+      "alias": "exampleorg",
+      "description": "Any verified user from Example Org will be included in this group.",
+      "domains": ["example.org"]
+    }
+
+Giving a ``description`` is optional. The ``name`` will be visible in the permission UI, so be sure to pick a sensible
+value.
+
+The ``domains`` field is mandatory to be an array. This enables creation of multi-domain groups, too.
+
+Obviously you can create as many of these groups you might like, as long as the ``alias`` is unique.
+
+To load it into your Dataverse installation, either use a ``POST`` or ``PUT`` request (see below):
+
+``curl -X POST -H 'Content-type: application/json' http://localhost:8080/api/admin/groups/domain --upload-file domainGroup1.json``
+
+Updating a Mail Domain Group
+----------------------------
+
+Editing a group is done by replacing it. Grab your group definition like the :ref:`above example <domainGroup1.json>`,
+change it as you like and ``PUT`` it into your installation:
+
+``curl -X PUT -H 'Content-type: application/json' http://localhost:8080/api/admin/groups/domain/domainGroup1 --upload-file domainGroup1.json``
+
+Please make sure that the alias of the group you want to change is included in the path. You also need to ensure
+that this alias matches with the one given in your JSON file.
+
+.. hint:: This is an idempotent call, so it will create the group given if not present.
+
+Deleting a Mail Domain Group
+----------------------------
+
+To delete a Mail Domain Group with an alias of "domainGroup1", use the curl command below:
+
+``curl -X DELETE http://localhost:8080/api/admin/groups/domain/domainGroup1``
+
+Please note: it is not recommended to delete a Mail Domain Group that has been assigned roles. If you want to delete
+a Mail Domain Group, you should first remove its permissions.
+