test email check ip

tests/test_email.py

@@ -74,6 +74,9 @@ def check_relay():
         ip = conf.get('NETWORK_IP_NAT')
         if not ip:
             ip = conf.get('NETWORK_IP')
+        if not ip:
+            print_yellow('Cannot determine public IP address')
+            return 3
         with open('/etc/mailname', 'r') as f:
             d = f.read().strip()
         if d not in ('ubicast.tv', 'ubicast.eu'):