diff --git a/testsite/group_vars/xmpp.yml b/testsite/group_vars/xmpp.yml
index 9e61b6193e235b231160c54c85d484aef6f0a54a..0ac44b4a7f6857cb660df38dcba5a6e9e3137716 100644
--- a/testsite/group_vars/xmpp.yml
+++ b/testsite/group_vars/xmpp.yml
@@ -14,6 +14,14 @@ ldap_client_config:
     option: TLS_CACERT
     value: /etc/ssl/certs/truststore.pem
 
+local_mail_aliases:
+  root: "root john.doe@example.com"
+
+smtp_mynetworks:
+  - mail.example.com
+
+smtp_relay_host: mail.example.com
+
 prosody_administrators:
   - john.doe@example.com