interface/web/mail/form/mail_user.tform.php
@@ -160,7 +160,7 @@ 'type' => 'TOLOWER') ), 'validators' => array ( 0 => array ( 'type' => 'REGEX', 'regex' => '/^(\w+[\w\.\-\+]*\w{0,}@\w+[\w.-]*\.[a-z\-]{2,10}){0,1}$/i', 'regex' => '/^(\w+[\w\.\-\+]*\w{0,}@\w+[\w.-]*\.[a-z\-]{2,10}){0,1}(,\s*\w+[\w\.\-\+]*\w{0,}@\w+[\w.-]*\.[a-z\-]{2,10}){0,}$/i', 'errmsg'=> 'cc_error_isemail'), ), 'default' => '',