diff --git a/nodes/netcup.mails.py b/nodes/netcup.mails.py
index e31d4a0..2b5d0c4 100644
--- a/nodes/netcup.mails.py
+++ b/nodes/netcup.mails.py
@@ -30,7 +30,7 @@
                 'interface': 'eth0',
                 'ipv4': '202.61.255.108/22',
                 'gateway4': '202.61.252.1',
-                'ipv6': '2a03:4000:55:a89::2/64',
+                'ipv6': '2a03:4000:55:a89::1/64',
                 'gateway6': 'fe80::1',
             }
         },