diff --git a/roles/docker/defaults/main.yml b/roles/docker/defaults/main.yml
index 74d66fa9..295631b5 100644
--- a/roles/docker/defaults/main.yml
+++ b/roles/docker/defaults/main.yml
@@ -48,3 +48,6 @@ data_coop_website:
 
 cryptohagen_website:
   domain: "cryptohagen.dk"
+
+mailu:
+  subnet: 192.168.203.0/24
diff --git a/roles/docker/tasks/services/mailu.yml b/roles/docker/tasks/services/mailu.yml
index 6d17acc3..d9af6520 100644
--- a/roles/docker/tasks/services/mailu.yml
+++ b/roles/docker/tasks/services/mailu.yml
@@ -1,5 +1,11 @@
 ---
 
+- name: setup network for mailu
+  docker_network:
+    name: mailu
+    ipam_options:
+      subnet: "{{ mailu.subnet }}"
+
 - name: create mailu volume folders
   file:
     name: "{{ mailu.volume_folder }}/{{ volume }}"
diff --git a/roles/docker/templates/mailu.env b/roles/docker/templates/mailu.env
index 527fa76e..7e006273 100644
--- a/roles/docker/templates/mailu.env
+++ b/roles/docker/templates/mailu.env
@@ -26,7 +26,7 @@ SECRET_KEY={{ mailu_secret_key }}
 # PUBLIC_IPV6= ::1 (default: ::1)
 
 # Subnet of the docker network. This should not conflict with any networks to which your system is connected. (Internal and external!)
-SUBNET=192.168.203.0/24
+SUBNET={{ mailu.subnet }}
 
 # Main mail domain
 DOMAIN=data.coop