System I/O errors - Help needed.

[Andrew Morgan]

On Mon, 2 Jul 2007, Anders Norrbring wrote:

> I've gotten a couple of reports from clients using Outlook Express that
> they get the following:
>
> Your 'Inbox' folder was not polled for its unread count. Could not get
> the unread counts for 'Inbox' on 'Fredrik' Account: 'Fredrik', Server:
> 'mail.the-server.net', Protocol: IMAP, Server Response: 'System I/O
> error', Port: 143, Secure(SSL): No, Error Number: 0x800CCCD2
>
>
> I don't see any errors at all on my own 12 accounts on the same IMAP
> server, which is Cyrus v2.3.8.
> I tried to run a reconstruct on the problematic mailboxes, still the
> errors continues. Of course their "read" status aren't updated.

This sounds like the user's .seen file is corrupted.  You can try moving 
the .seen file for this user to a backup filename.  Cyrus will recreate a 
fresh one.  If that fixes the problem, then do a google search for 
'skiplist.py' and use that tool to repair the old .seen file.

 	Andy