diff --git a/tiramisu/option/domainnameoption.py b/tiramisu/option/domainnameoption.py
index 021442e..a6924ff 100644
--- a/tiramisu/option/domainnameoption.py
+++ b/tiramisu/option/domainnameoption.py
@@ -74,12 +74,10 @@ class DomainnameOption(StrOption):
             else:
                 min_time = 1
             regexp = r'((?!-)[a-z0-9-]{{{1},{0}}}\.){{{1},}}[a-z0-9-]{{1,{0}}}'.format(self._get_len(type), min_time)
-            msg = _('only lowercase, number, "-" and "." characters are allowed')
-            msg_warning = _('only lowercase, number, "-" and "." characters are recommanded')
         else:
             regexp = r'((?!-)[a-z0-9-]{{1,{0}}})'.format(self._get_len(type))
-            msg = _('only lowercase, number and "-" characters are allowed')
-            msg_warning = _('only lowercase, number and "-" characters are recommanded')
+        msg = _('must start with lowercase characters followed by lowercase characters, number, "-" and "." characters are allowed')
+        msg_warning = _('must start with lowercase characters followed by lowercase characters, number, "-" and "." characters are recommanded')
         if allow_ip:
             msg = _('could be a IP, otherwise {}').format(msg)
             msg_warning = _('could be a IP, otherwise {}').format(msg_warning)