diff --git a/trytond/trytond/tools/email_.py b/trytond/trytond/tools/email_.py
index c21366873f..c6af6d48dc 100644
--- a/trytond/trytond/tools/email_.py
+++ b/trytond/trytond/tools/email_.py
@@ -68,7 +68,7 @@ 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