dovecot - Oct 2013 - Right values for Antispam plugin

Hi!
I'm currently configuring the Dovecot Antispam plugin for the use with
Dspam. In general it works, but I'm not sure about one special config
parameter:
antispam_dspam_args

At the moment I set it to:
antispam_dspam_args = --source=error;--signature=%%s;--user;%u

Is that the appropriate value for retraining? I'm not sure if
"%%s" is
correct to get the signature value. I was not able to find any
documentation that describes that value.

So I just want to know if my plugin config is correct for retraining.


plugin {
 antispam_backend = dspam
 antispam_spam = Spam
 antispam_trash = trash;Trash;Deleted Items;Deleted Messages
 antispam_signature = X-DSPAM-Signature
 antispam_signature_missing = move
 antispam_dspam_binary = /usr/bin/dspam
 antispam_dspam_args = --source=error;--signature=%%s;--user;%u
}


Thanks,
Michael