diff --git a/install/mysql.sql b/install/mysql.sql
index 93e81ee8..19fcd336 100644
--- a/install/mysql.sql
+++ b/install/mysql.sql
@@ -259,7 +259,7 @@ CREATE TABLE IF NOT EXISTS `mailbox` (
   `update_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, -- Update date, for technical usage only.
   `bytes` bigint(20) NOT NULL DEFAULT '0', -- number of bytes in the mailbox, filled by dovecot
   `messages` int(11) NOT NULL DEFAULT '0', -- number of messages in the mailbox, filled by dovecot 
-  `lastlogin` datetime NOT NULL, -- Last login, filled by dovecot
+  `lastlogin` datetime NOT NULL DEFAULT '0', -- Last login, filled by dovecot
   `mail_action` enum('OK','DELETE','DELETING') NOT NULL default 'OK', -- mail_action is DELETE or DELETING when deleting a mailbox by cron
   PRIMARY KEY (`id`),
   UNIQUE KEY `address_id` (`address_id`)
diff --git a/install/upgrades/3.4.10.sql b/install/upgrades/3.4.10.sql
new file mode 100644
index 00000000..eb1bad9e
--- /dev/null
+++ b/install/upgrades/3.4.10.sql
@@ -0,0 +1,2 @@
+
+ALTER TABLE mailbox MODIFY  `lastlogin` DATETIME NOT NULL DEFAULT 0;