diff --git a/modules/openstack_project/manifests/lists.pp b/modules/openstack_project/manifests/lists.pp
index 91c20b0fa7..761aa50323 100644
--- a/modules/openstack_project/manifests/lists.pp
+++ b/modules/openstack_project/manifests/lists.pp
@@ -52,6 +52,11 @@ class openstack_project::lists(
     default_url_host   => 'lists.starlingx.io',
   }
 
+  mailman::site { 'opendev':
+    default_email_host => 'lists.opendev.org',
+    default_url_host   => 'lists.opendev.org',
+  }
+
   # Add new mailing lists below this line
 
   mailman_list { 'mailman@openstack':
@@ -462,4 +467,12 @@ class openstack_project::lists(
     password    => $listpassword,
     description => 'Discussion of OpenStack usage and development.',
   }
+
+  mailman_list { 'mailman@opendev':
+    require     => Mailman::Site['opendev'],
+    ensure      => present,
+    admin       => 'nobody@openstack.org',
+    password    => $listpassword,
+    description => 'The mailman site list',
+  }
 }
diff --git a/playbooks/host_vars/lists.openstack.org.yaml b/playbooks/host_vars/lists.openstack.org.yaml
index 6604c5f449..e15992904c 100644
--- a/playbooks/host_vars/lists.openstack.org.yaml
+++ b/playbooks/host_vars/lists.openstack.org.yaml
@@ -1,4 +1,4 @@
-mm_domains: 'lists.openstack.org:lists.zuul-ci.org:lists.airshipit.org:lists.starlingx.io'
+mm_domains: 'lists.openstack.org:lists.zuul-ci.org:lists.airshipit.org:lists.starlingx.io:lists.opendev.org'
 exim_local_domains: "@:{{ mm_domains }}"
 exim_aliases:
   root: "{{ ','.join(listadmins|default([])) }}"