[Dovecot] Dovecot antispam unable to call dspam since dovecot upgrade to 2.X

[Guillaume Hilt]

     Hello,

Running Gentoo AMD64 2013 with postfix, mysql, dovecot and dspam, i 
finally upgraded to dovecot 2.X.
I'm running dovecot 2.2.6, dspam 3.10.2-r1 and 
dovecot-antispam-2.0_pre20130429.

My DSPAM configuration hasn't changed between dovecot 1.X and 2.X.

When i'm moving a mail to or from the Spam folder, Igot this error in my 
logs :
Nov 14 10:33:25 srv1 dovecot: imap(ghilt at shadowprojects.org): Debug: 
dspam error:7751 prefix=imap(ghilt at shadowprojects.org):
Nov 14 10:33:25 srv1 dovecot: imap(ghilt at shadowprojects.org): Debug: 
executing /usr/bin/dspam failed: 13 (uid=1001, gid=12)
Nov 14 10:33:25 srv1 dovecot: imap: Error:
Nov 14 10:33:25 srv1 dovecot: imap: Error:

uid 1001 is user vmail (dovecot is running under vmail)
gid 12 is group mail (vmail is a member, with 
mail,postfix,dspam,dovecot,apache)


I enabled DSPAMdebug mode and when i move the mail, i don't see anything 
in the logs, meaning that dspam isn't called at all.
Enabling debug in dovecot doesn't give me more informations.


Here's my dovecot plugins settings :
plugin {
   #setting_name = value

         # Selects the specific backend to be used for spam system training
         antispam_backend = dspam

         # Specifies whether to allow appending mails to the spam folder
         # from the unknown source. Optional, default = NO.
         antispam_allow_append_to_spam = NO

         # Specifies whether to skip the leading "From " line of the mail
         # piped to the backend processor. Optional, default = NO.
         antispam_skip_from_line = NO

         # semicolon-separated list of spam folders
         antispam_spam = Spam

         # semicolon-separated list of Trash folders (default unset i.e. 
none)
         antispam_trash = Trash

         # semicolon-separated list of unsure folders (default unset 
i.e. none)
         #antispam_unsure =

         # mail signature (used with any backend requiring a signature)
         antispam_signature = X-DSPAM-Signature

         # specifies what to do if the signature header is missing. Possible
         # values: "move" (move the mail silently without training), "error"
         # (display an error stating that the signature header is missing).
         # Optional, default = "error".
         antispam_signature_missing = error

         # specifies the path to the dspam client binary.
         # Optional, default = "/usr/bin/dspam".
         antispam_dspam_binary = /usr/bin/dspam

         # list of command line arguments to the dspam binary. Must include
         # one "%%s" in order to be replaced with the signature value.
         # Optional, default = "--source=error;--signature=%%s".
         antispam_dspam_args = 
--user;%u;--deliver=;--source=error;--signature=%%s

         # command line argument to specify that mail should be reclassified
         # as SPAM. Optional, default = "--class=spam".
         antispam_dspam_spam = --class=spam

         # command line argument to specify that mail should be reclassified
         # as not SPAM. Optional, default = "--class=innocent".
         antispam_dspam_notspam = --class=innocent

         # specifies the mail header name to derive the classification 
result.
         # Optional, default = NONE.
         antispam_dspam_result_header = X-DSPAM-Result

         # specifies the list of classification results to avoid retraining
         # for. Optional, default = NONE.
         #antispam_dspam_result_blacklist = Virus;Blocklisted;Blacklisted
}


USE flags :
[I] mail-filter/dovecot-antispam
      Available versions:  (~)2.0_pre20120226 (~)2.0_pre20130429
      Installed versions:  2.0_pre20130429(12:26:34 04/11/2013)
      Homepage:            http://wiki2.dovecot.org/Plugins/Antispam/
      Description:         A dovecot antispam plugin supporting multiple 
backends

[I] net-mail/dovecot
      Available versions:  2.0.19 2.1.9 2.1.16 (~)2.1.17 2.2.5 (~)2.2.6 
{bzip2 caps cydir doc imapc ipv6 kerberos ldap lucene +maildir 
managesieve mbox mdbox mysql pam pop3c postgres sdbox selinux sieve solr 
sqlite (+)ssl static-libs suid tcpd vpopmail zlib}
      Installed versions:  2.2.6(12:26:15 04/11/2013)(bzip2 ipv6 maildir 
managesieve mysql pam sieve ssl tcpd zlib -caps -cydir -doc -imapc 
-kerberos -ldap -lucene -mbox -mdbox -pop3c -postgres -sdbox -selinux 
-solr -sqlite -static-libs -suid -vpopmail)
      Homepage:            http://www.dovecot.org/
      Description:         An IMAP and POP3 server written with security 
primarily in mind

[I] mail-filter/dspam
      Available versions:  3.10.2-r1 {clamav daemon debug +domain-scale 
+hash large-scale ldap mysql postgres small-scale sqlite static-libs 
syslog user-homedirs virtual-users}
      Installed versions:  3.10.2-r1(10:08:06 14/11/2013)(clamav daemon 
domain-scale mysql syslog virtual-users -debug -hash -large-scale -ldap 
-postgres -small-scale -sqlite -static-libs -user-homedirs)
      Homepage:            http://dspam.sourceforge.net/
      Description:         A statistical-algorithmic hybrid anti-spam filter


DSPAM binary is owned by dspam (chmod u+s) :
-r-s--x--- 1 dspam dspam 96K 14 nov.  10:08 /usr/bin/dspam


And all the necessary users are trusted by DSPAM :
Trust root
Trust dspam
Trust apache
Trust mail
Trust mailnull
Trust smmsp
Trust daemon
Trust vmail
Trust dovecot
Trust postfix

Any idea ?

Thanks,

-- 
   Guillaume Hilt