1 files changed, 25 insertions, 1 deletions
diff --git a/src/mailman/interfaces/domain.py b/src/mailman/interfaces/domain.py
index f9476fc3d..96ec1568d 100644
--- a/src/mailman/interfaces/domain.py
+++ b/src/mailman/interfaces/domain.py
@@ -29,7 +29,7 @@ __all__ = [
 
 from lazr.restful.declarations import (
     collection_default_content, export_as_webservice_collection,
-    export_as_webservice_entry, exported)
+    export_as_webservice_entry, export_factory_operation, exported)
 from zope.interface import Interface, Attribute
 from zope.schema import TextLine
 
@@ -174,3 +174,27 @@ class IDomainCollection(Interface):
         :return: The list of all known domains.
         :rtype: list of `IDomain`
         """
+
+    @export_factory_operation(
+        IDomain,
+        ('email_host', 'description', 'base_url', 'contact_address'))
+    def new(email_host, description=None, base_url=None, contact_address=None):
+        """Add a new domain.
+
+        :param email_host: The email host name for the domain.
+        :type email_host: string
+        :param description: The description of the domain.
+        :type description: string
+        :param base_url: The base url, including the scheme for the web
+            interface of the domain.  If not given, it defaults to
+            http://`email_host`/
+        :type base_url: string
+        :param contact_address: The email contact address for the human
+            managing the domain.  If not given, defaults to
+            postmaster@`email_host`
+        :type contact_address: string
+        :return: The new domain object
+        :rtype: `IDomain`
+        :raises `BadDomainSpecificationError`: when the `email_host` is
+            already registered.
+        """