Spam will be deleted if you select Discard.
Yes. The problem is that ALL mails are deleted when the Spam Filter checkbox is activated, although the Spam Strategy is Pass.
Besides, I've checked when the Spam Filter is activated and I try to send an email to this account, in the mailbox only appers the following:
X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on reser.mpginfo.com
X-Spam-Status: No, score=3.2 required=5.0 tests=EMPTY_MESSAGE,MISSING_HEADERS,
MISSING_SUBJECT,NO_RECEIVED,NO_RELAYS,TO_CC_NONE autolearn=no version=3.
If I desactive the Spam Filters, mails arrive normally.