[Dovecot] dovecot-antispam: Failed to read mail beginning, Next message unexpectedly lost

[Jiri Novosad]

Timo Sirainen wrote:
> On Wed, 2008-08-20 at 11:15 +0200, Jiri Novosad wrote:
>> Hi again,
>>
>> I tried this on Gentoo with dovecot-antispam version 20080601 and
>> dovecot versions 1.0.15-r1, 1.1.0, 1.1.1 and 1.1.2.
>> Versions 1.1.0+ all fail.
>> Version 1.0.15-r1 works fine, even if I add the "Next message
>> unexpectedly lost" check (see below).
>>
>> So it seems to be a bug in dovecot (? but I guess it could be
>> dovecot-antispam, too).
>>
>> Could someone at least confirm this behaviour?
>> Note that I use mbox, maildir seems to be OK.
> 
> I guess it's a Dovecot bug, but probably not too easy to fix. In any
> case I don't have time to look at it.
> 
> The problem is that at the point where dovecot-antispam is reading the
> message it hasn't yet been committed. Actually it's still possible that
> the transaction fails and the message doesn't even get saved. Perhaps
> antispam plugin should read the messages only after commit? But after
> commit the mbox has been unlocked and it's possible that another process
> has already had a chance to expunge it. So maybe not that either..

Ok, thanks for the explanation. I may consider switching to maildir
(or even looking into the code if time permits).

J. N.