diff --git a/vmail.sql b/vmail.sql
index 125d4e3..b127e19 100644
--- a/vmail.sql
+++ b/vmail.sql
@@ -121,7 +121,6 @@ CREATE TABLE `vm_mboxes` (
   `id` int(10) UNSIGNED NOT NULL,
   `domain_id` int(10) UNSIGNED NOT NULL,
   `mbox` varchar(128) NOT NULL,
-  `username` varchar(128) NOT NULL,
   `passwd` char(128) NOT NULL,
   `status` tinyint(1) NOT NULL DEFAULT 1,
   `quota` int(10) UNSIGNED DEFAULT NULL,
@@ -185,7 +184,6 @@ ALTER TABLE `vm_greylisting_resenders`
 --
 ALTER TABLE `vm_mboxes`
   ADD PRIMARY KEY (`id`),
-  ADD UNIQUE KEY `username` (`username`),
   ADD KEY `email` (`domain_id`,`mbox`) USING BTREE;
 
 --