This was an unplanned restart of the mail system. As is the case sometimes, there was an issue with the mail system database that required a restart of the mail system database server. Since we have to shutdown the entire mail system to perform this restart, we decided to take advantage of the situation and perform some maintenance to these servers. Normaly, a resart only takes about 10 minutes, because of the updates, the system was kept down for about 30 minutes. We apologize for any inconveinences caused by this outage.