diff --git a/2.Common_services/1.Postfix/0_setup.py b/2.Common_services/1.Postfix/0_setup.py
index aa4d40fc8ff9dc9d3651ca4872b42155dd526a8a..068002b6fca8d8d3d80bb5750df3b82520768faf 100644
--- a/2.Common_services/1.Postfix/0_setup.py
+++ b/2.Common_services/1.Postfix/0_setup.py
@@ -27,7 +27,7 @@ def setup(interactive=True):
             ('{{ smtp }}', server),
         )),
         'echo "%s" > /etc/mailname' % mailname,
-        'rgrep root /etc/aliases || echo "root: sysadmin@ubicast.eu" >> /etc/aliases',
+        'rgrep "root:" /etc/aliases || echo "root: sysadmin@ubicast.eu" >> /etc/aliases',
         'service postfix restart',
         'newaliases',
     ]