yesterday, my zimbra service mailboxdctl crashed throughout the day without reason.

This morning, a user say to me, he don't receive any mail since 2 days. He use Outlook to connect her mailbox with IMAP. When i'm trying to connect to his mailbox in webmail, i can't , and my service shutdown. When i'm trying to configure account in the administrative web interface, i have an error like :

And my service shutdown again.

I have try to see the account info with the command line:

zmprov getMailboxInfo "mail_adresse_account"
I received the following error

[] INFO: I/O exception (org.apache.commons.httpclient.NoHttpResponseExcep tion) caught when processing request: The server zimbra.monserveur.com failed to respond
[] INFO: Retrying request
ERROR: zclient.IO_ERROR (invoke Connection refused, server: zimbra.monserveur.com) (cause: java.net.ConnectException Connection refused)
And my service shutdown again.

How can I repare this mailbox?

thanks a lot

(please excuse my bad english)