[Dovecot] Dovecot antispam plugin bug: got an empty message

[Petr Bravenec]

It looks that I have misconfigured the dovecot plugin:

plugin {

         antispam_dspam_binary = /usr/bin/dspam # should be dspam
#	   antispam_dspam_binary = /usr/bin/dspamc # does not work

         antispam_signature = X-DSPAM-Signature
         antispam_signature_missing = move
         antispam_spam_pattern_ignorecase = Junk;Junk.*
         antispam_trash_pattern_ignorecase = Trash;Deleted Items
         antispam_backend = dspam
         antispam_dspam_args = --user;%u;--deliver=;--source=error;--
signature=%%s
         antispam_dspam_spam = --class=spam
         antispam_dspam_notspam = --class=innocent
 
 }

Petr Bravenec

Dne So 9. června 2012 22:23:05 Petr Bravenec napsal(a):
> It is few months ago I requested help with combination dovecot - dovecot-
> antispam plugin and dspam.
> 
> Now I got into troubles with a lot of spam delivering to users inbox.
> Problem described bellow is now better hidden but stil remains:
> 
> When moving a message from INBOX to Junk, dspam got an empty message.
> I made a wrapper about dspamc and there is no input on stdio. The dspam was
> not trained (got an empty message).
> 
> Looking to source code of dspam and antispam plugin I suspect the dovecot
> not to sending any content to plugin when moving from inbox to junk.
> 
> Petr Bravenec
> 
> Dne Wednesday 25 of January 2012 17:19:18 Tom Hendrikx napsal(a):
> > On 25-01-12 08:05, Petr Bravenec wrote:
> > > Few weeks ago I upgraded dovecot from 1.2 to 2.0.16 and antispam plugin
> > > to 2.0_pre20101222. Since the upgrade I'm not able to move messages to
> > > my Junk folder. In the maillog I have found this message:
> > > 
> > > dspam[25060]: empty message (no data received)
> > 
> > Gentoo has included the antispam plugin from Johannes historically, but
> > added the fork by Eugene to support upgrades to dovecot 2.0. It is not
> > really made clear by the gentoo ebuild is that the forked plugin needs a
> > slightly different config.
> > 
> > I use the config below with dovecot 2.0.17 and a git checkout for
> > dovecot-antispam:
> > 
> > ===8<========
> > plugin {
> > 
> >         antispam_signature = X-DSPAM-Signature
> >         antispam_signature_missing = move
> >         antispam_spam_pattern_ignorecase = Junk;Junk.*
> >         antispam_trash_pattern_ignorecase = Trash;Deleted Items;Deleted
> > 
> > Messages
> > 
> >         # Backend specific
> >         antispam_backend = dspam
> >         antispam_dspam_binary = /usr/bin/dspamc
> >         antispam_dspam_args =
> > 
> > --user;%u;--deliver=;--source=error;--signature=%%s
> > 
> >         antispam_dspam_spam = --class=spam
> >         antispam_dspam_notspam = --class=innocent
> >         #antispam_dspam_result_header = X-DSPAM-Result
> > 
> > }
> > 
> > 
> > --
> > Regards,
> > 
> > 	Tom