[Dovecot] dovecot-dspam-plugin not launching dspam

[Stefan Schmidt]

hello,
>   
>> 1) calling dspam from the commandline with the same parameters as in the 
>> (slightly modified) plugin works fine
>>
>> :/# su virtual
>> :/$ /usr/bin/dspam --user retrain --source=error --stdout --class=spam 
>> --signature=4,4434846e237406491211187 --debug
>>     
> That user looks odd. Is that intentional?
>   
yes, if the "--user" option is missing dspam refuses to launch, but it 
is only a dummy user. when dspam is called it switches to user belonging 
to the signature.
> I would guess that some environment is different, but I don't know.
> dovecot is running as user 'virtual' in that setup?
>   
no, dovecot is running as user dovecot. but to my understanding it 
switches to the userid of the virtual user accounts before 
reading/writing data to the maildirs.
> Personally, I'm still running an ancient version of dspam with the
> plugin. Maybe I'll run into the same problems once I managed to upgrade.
>   
please inform me if you stumble across any solutions :-)

stefan