On 18.7.2012, at 15.49, Micha Krause wrote:

Jul 18 14:36:09 mailint1 dovecot: imap(micha): Error: FETCH [] for mailbox INBOX.Sent UID 166 got too little data: 120860 vs 120867 Jul 18 14:36:09 mailint1 dovecot: imap(micha): Error: Maildir filename has wrong W value: /var/mail/mailboxes/users/micha/.Sent/cur/1240390202.Rfd9752b8Q14135.mail-alt,S=280003,W=284007:2,S Jul 18 14:36:09 mailint1 dovecot: imap(micha): Error: Corrupted index cache file /var/mail/mailboxes/users/micha/.Sent/dovecot.index.cache: Broken virtual size for mail UID 166

All of those numbers seem wrong..

so far i tried deleting:

/var/mail/mailboxes/users/micha/.Sent/dovecot.index.cache /var/mail/mailboxes/users/micha/.Sent/dovecot.index /var/mail/mailboxes/users/micha/.Sent/dovecot.index.log

I tried to renaming: /var/mail/mailboxes/users/micha/.Sent/cur/1240390202.Rfd9752b8Q14135.mail-alt,S=280003,W=284007:2,S to /var/mail/mailboxes/users/micha/.Sent/cur/1240390202.Rfd9752b8Q14135.mail-alt,S=280003:2,S

How large is that file really? I think you need to both rename it and delete dovecot.index.cache file. If the S=value is also wrong you'd need to delete it too.