postfix+amavis+spamassassin messages marked ass spam are lost

i've configured postfix+amavis+spamassassin

s fine except that when a mail is consider spam its dessapear (indeed,
it goes to a directory called qarantine)

i've in amavisd.conf

$final_spam_destiny = D_PASS

but what happen is that:

Mar 16 19:51:08 tutatis postfix/smtpd[3060]: connect from
pproxy.gmail.com[64.233.166.181]
Mar 16 19:51:09 tutatis postfix/smtpd[3060]: 498CB136170:
client=pproxy.gmail.com[64.233.166.181]
Mar 16 19:51:09 tutatis postfix/cleanup[3063]: 498CB136170:
message-id=<84b2593e0603161051h705826...@mail.gmail.com>
Mar 16 19:51:09 tutatis postfix/qmgr[1091]: 498CB136170:
from=<algu...@gmail.com>, size=2977, nrcpt=1 (queue active)
Mar 16 19:51:15 tutatis postfix/smtpd[3068]: connect from
localhost[127.0.0.1]
Mar 16 19:51:15 tutatis postfix/smtpd[3068]: NOQUEUE: reject: RCPT from
localhost[127.0.0.1]: 450 <usuario+s...@midominio.com>: Recipient
address rejected: User unknown in local recipient table;
from=<algu...@gmail.com> to=<usuario+s...@midominio.com> proto=ESMTP
helo=<localhost>
Mar 16 19:51:15 tutatis amavis[1127]: (01127-04) mail_via_smtp: DATA
skipped, no valid recips, 1
Mar 16 19:51:15 tutatis postfix/smtpd[3068]: disconnect from
localhost[127.0.0.1]
Mar 16 19:51:15 tutatis amavis[1127]: (01127-04) mail_via_smtp: 450
4.1.0 <usuario+s...@midominio.com>: Recipient address rejected: User
unknown in local recipient table
Mar 16 19:51:15 tutatis amavis[1127]: (01127-04) Blocked SPAM,
[64.233.166.181] <algu...@gmail.com> -> <usua...@midominio.com>,
quarantine:
spam-e694a882ef2584380ecc01ab13f99db8-20060316-195110-01127-04,
Message-ID: <(E-Mail Removed)>, Hits: 1001.075
Mar 16 19:51:15 tutatis postfix/smtp[3064]: 498CB136170:
to=<usua...@midominio.com>, relay=127.0.0.1[127.0.0.1], delay=6,
status=deferred (host 127.0.0.1[127.0.0.1] said: 450 4.1.0
<usuario+s...@midominio.com>: Recipientaddress rejected: User unknown in
local recipient table (in reply to end of DATA command))

on one hand appears usuario+spam ..... ok, that user does'nt exist in
my system, so the mail is not delivered to him
on the other hand i see it says "blocked spam" and "quarantine", but i
say that let the spam pass with:

$final_spam_destiny = D_PASS

is something wrong? its necessary something else to let spam pass?


TIA