On 03 Jun 2016, at 11:26, Dave <dovecot-e51@deemzed.uk> wrote:
We tested with 2.2.24, and were unable to reproduce the error. Can you try again with 2.2.24?
Apologies for butting in, but I've been seeing exactly the same issue post upgrade to 2.2.24 (from 2.2.18):
[2016-06-02T10:38:28+0100] imap(xxxxx): Error: Corrupted index cache file /mnt/index/8cc/95 2952/.INBOX/dovecot.index.cache: Broken MIME parts for mail UID 13758 in mailbox INBOX: Cached MIME parts don't match message during parsing: Cached header size mismatch (parts=41000000f7020000000000000a030000000000000508000
This bug should have been fixed by https://github.com/dovecot/core/commit/20faa69d801460e89aa0b1214f3db4b026999... + https://github.com/dovecot/core/commit/1bc6f1c54b4d77830288b8cf19060bd8a6db7...