Increased errors "Broken MIME parts" in log file

Thu Jun 2 21:58:36 UTC 2016

On 01 Jun 2016, at 16:48, Alessio Cecchi <alessio at skye.it> wrote:
> 
> Hi,
> 
> after the last upgrade to Dovecot 2.2.24.2 (d066a24) I see an increased number of errors "Broken MIME parts" for users in dovecot log file, here an example:
> 
> Jun 01 15:25:29 Error: imap(alessio.cecchi at skye.it): Corrupted index cache file /home/domains/skye.it/alessio.cecchi/Maildir/dovecot.index.cache: Broken MIME parts for mail UID 34 in mailbox INBOX: Cached MIME parts don't match message during parsing: Cached header size mismatch (parts=410000005b070000000000007b07000000000000fc0a000000000000400b0000000000000300000048000000800700000000000060000000000000006400000000000000200000000000000021000000000000000100000040000000260800000000000027000000000000002900000000000000ea00000000000000f000000000000000440000005d090000000000001e000000000000002000000000000000b308000000000000e0080000000000002d00000001000000410000007b09000000000000b208000000000000de080000000000000000000000000000000000000000000000000000)
..

> but the error reappears always (for the same UID) when I do "search" from webmail. All works fine for the users but I don't think is good to have these errors in log file.

If it's reproducible for a specific email, can you send me the email?