[Dovecot] SiS attachment file larger than expected

[Erik Persson]

Hello!

Name's Erik and I have been using Dovecot for a few months and I so far quite happy with the software.  To this list I am quite new though.

After a testing period I have now been running a ~300 user system running CentOS 6 and Dovecot 2.1.14 with Postfix and SiS enabled.

For the large part the system is running flawlessly but I have caught a few error messages:

imap(censored at censored.domain): Error: Attachment file /mail/attachments/70/d0/70d04b12123bfb145983f5a674ee2e65029a4018aff1c6db51993b75f10bf101-117a1a3b06f54251e96200004d877aa0 larger than expected (370113)

The total number of files that I have found complaints about in the log are less than 10 accessed by 3 users in a attachment file system that by now is housing 100k + files.

The only common denominator I have found so far is that all the attachments are PDF files.  Most if not all of the logged files are the only referenced link of the corresponding hash.


Any idea what might be causing this and how it can be prevented? I do like to be a bit paranoid when it comes to data integrity.  As I am not completely familiar with the dovecot tools I also wonder if there is a way to find the offending message in the mailbox other than trying to access it via a mail client?


Best regards and keep up the good work!

/Erik