On 19.12.2012, at 15.35, Morten Stevens <[email protected]> wrote:

> I see the error again. (this is a newly created folder)
> 
> Dec 19 14:20:45 mail dovecot: imap-login: Login: user=<[email protected]>, 
> method=PLAIN, rip=109.90.118.156, lip=81.30.145.131, mpid=16599, TLS, 
> session=<0jJoezTRewBtWnac>
> Dec 19 14:20:57 mail dovecot: imap([email protected]): Error: Cached message 
> size larger than expected (4318 > 4244)
> Dec 19 14:20:57 mail dovecot: imap([email protected]): Error: Corrupted index 
> cache file 
> /var/vmail/example.org/user2//mdbox/mailboxes/Wiki/dbox-Mails/dovecot.index.cache:
>  Broken physical size for mail UID 15
> Dec 19 14:20:57 mail dovecot: imap([email protected]): Error: 
> read(/var/vmail/example.org/user2//mdbox/storage/m.15626) failed: 
> Input/output error (FETCH for mailbox Wiki UID 15)
> Dec 19 14:20:57 mail dovecot: imap([email protected]): Disconnected: Internal 
> error occurred. Refer to server log for more information. [2012-12-19 
> 14:20:57] in=2153 out=1200970
> 
> Do you need the index cache files?

Hmh. I can't figure out how that could happen. Also the index files alone 
probably aren't enough.. Can you send the index files, 
storage/dovecot.map.index* files and storage/m.* files put through 
http://dovecot.org/tools/mdbox-obfuscate.pl to remove the actual message 
contents. Then only the dovecot.index.cache file has anything sensitive (some 
message headers).

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