diff --git a/host_vars/emma.ccchb.de.yml b/host_vars/emma.ccchb.de.yml
index 1ce23de..76683d0 100644
--- a/host_vars/emma.ccchb.de.yml
+++ b/host_vars/emma.ccchb.de.yml
@@ -6,6 +6,7 @@ postfix_my_networks:
   - '2a01:4f8:150:926f::2'
   - '176.9.59.104'
   - '127.0.0.1'
+  - '10.0.0.0/24'
 
 haproxy_v4: 176.9.59.104
 haproxy_v6: 2a01:4f8:150:926f::2