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