[qmailtoaster] squirrel rules

[Sergio Minini {NETKEY}]

Hey there!
I set up a rule in my webmail with squirrel to send all msgs tagged **SPAM** to
the Trash. But I found out that I downloaded all the mails with Thunderbird and
the rule only did run when I logged in to squirrel.
 
So, is there a way to apply the filters when messages arrive to my user inbox,
w/o login in to squirrel or downloading the messages with POP3?
 
Thanks! Sergio