diff --git a/trytond/trytond/tools/email_.py b/trytond/trytond/tools/email_.py
index b5a1570918..5f28584e43 100644
--- a/trytond/trytond/tools/email_.py
+++ b/trytond/trytond/tools/email_.py
@@ -63,7 +63,7 @@ try:
             emailinfo = _validate_email(
                 email, check_deliverability=False,
                 test_environment=Pool.test)
-            return emailinfo.ascii_email
+            return emailinfo.ascii_email or emailinfo.normalized
         except EmailNotValidError:
             return email