[Dovecot] odd behaviour with antispam plugin

hey,

in my dspam database there has been some odd behaviour:

during training dspam had created an uid entry named by the local part of the email. i.e.:

user1

I use a virtual setup using dovecot, postfix and postfixadmin. On my first try I set up a database for dspam itself and there this happened. After I couldn't figure out how to solve this, I merged the database into the postfixadmin database.

But using just the username for identifying email adresses is a bit critical within a virtual environment with multiple domains, isn't it?

if one would not merge the databases - how could he solve this problem?

Greetz, Zyan K Lee