[Dovecot] dovecot-dspam-plugin not launching dspam

[Stefan Schmidt]

> Does the user 'retrain' exist in the virtual_uids table?
yes, there is a user retrain in the the table dspam_virtual_uids of my 
dspam database libdspam7drvpgsql.
> Also, you really shouldn't need to specify --user to run dspam, the 
> uid is stored with the signature data, and I'm running without it...
i would love to it this way :-)
> what error do you get without --user?  This error also appears to 
> usually be generated by a problem with the LDA which is somewhat odd 
> since retraining shouldn't attempt to deliver the message.
without the "--user"-option dspam throws the same error as dovecot does 
when called either with or without it and writes nothing to the 
dspam.debug-log.

Unable to determine the destination user
DSPAM agent misconfigured: aborting

called with the "--user"-option via commandline the dspam.debug-log says

No QuarantineAgent option found. Using standard quarantine.
DSPAM Instance Startup
input args: /usr/bin/dspam --debug --user retrain --source=error 
--stdout --class=innocent --signature=4,443a49e9305501142080570
pass-thru args:
processing user retrain
uid = 0, euid = 0, gid = 0, egid = 101
loading preferences for user retrain
Loading preferences for uid 7
Loading preferences for uid 0
Loading preferences for uid 0
default preferences empty. reverting to dspam.conf preferences.
Loading preferences from dspam.conf
using /var/spool/dspam/opt-in/local/retrain.dspam as path
using /var/spool/dspam/opt-out/local/retrain.nodspam as path
sedation level set to: 0
loading preferences for user 
the_virtual_user_belonging_to_the_signature at domain.tld
Loading preferences for uid 4
Loading preferences for uid 0
Loading preferences for uid 0
default preferences empty. reverting to dspam.conf preferences.
Loading preferences from dspam.conf
processing signature.  length: 10944
reversing 912 tokens
Control: [10 10] [9 11] Delta: [-1 1]
reclassifying iteration 1 result: 0
[graham] [0.010000] E: 7346274736306913280 (3frq, 0s, 3i)
[burton] [0.010000] E: 7346274736306913280 (3frq, 0s, 3i)
[...]
[burton] [0.010000] E: 9113948169156146802 (1frq, 0s, 3i)
[burton] [0.010000] E: 15732536091729293487 (1frq, 0s, 3i)
Graham-Bayesian Probability: 0.000000 Samples: 15
Burton-Bayesian Probability: 0.000000 Samples: 27
no factors specified; using default
Result Confidence: 0.99
libdspam returned probability of 0.000000
message result: NOT SPAM
DSPAM Instance Shutdown.  Exit Code: 0


stefan