diff --git a/libraries/src/Mail/Mail.php b/libraries/src/Mail/Mail.php
index d6311cc585d1a..9132e7939f0fc 100644
--- a/libraries/src/Mail/Mail.php
+++ b/libraries/src/Mail/Mail.php
@@ -146,7 +146,7 @@ public function Send()
 			return $result;
 		}
 
-		Factory::getApplication()->enqueueMessage(\JText::_('JLIB_MAIL_FUNCTION_OFFLINE'));
+		Factory::getApplication()->enqueueMessage(\JText::_('JLIB_MAIL_FUNCTION_OFFLINE'), 'warning');
 
 		return false;
 	}