diff --git a/roles/mail_server/molecule/default/molecule.yml b/roles/mail_server/molecule/default/molecule.yml
index 83a08eca835aa6844fcb5f33534da3c440bae4d9..f5ed5a3924caf053bb86785eba78605b48ced287 100644
--- a/roles/mail_server/molecule/default/molecule.yml
+++ b/roles/mail_server/molecule/default/molecule.yml
@@ -60,6 +60,11 @@ platforms:
         ip: 192.168.56.21
         network_name: private_network
         type: static
+      - auto_config: true
+        ip: fd00::192:168:56:21
+        network_name: private_network
+        netmask: 116
+        type: static
 
   - name: client2-bookworm
     groups:
@@ -75,6 +80,11 @@ platforms:
         ip: 192.168.56.22
         network_name: private_network
         type: static
+      - auto_config: true
+        ip: fd00::192:168:56:22
+        network_name: private_network
+        netmask: 116
+        type: static
 
   - name: parameters-mandatory-bookworm
     groups:
@@ -88,6 +98,11 @@ platforms:
         ip: 192.168.56.31
         network_name: private_network
         type: static
+      - auto_config: true
+        ip: fd00::192:168:56:31
+        network_name: private_network
+        netmask: 116
+        type: static
 
   - name: parameters-optional-bookworm
     groups:
@@ -101,6 +116,11 @@ platforms:
         ip: 192.168.56.32
         network_name: private_network
         type: static
+      - auto_config: true
+        ip: fd00::192:168:56:32
+        network_name: private_network
+        netmask: 116
+        type: static
 
 
 provisioner: