postfix problems

Hello
I am running a Centos 5 server with Sendmail.

I am having some problems switching to postfix.

I have the following entry in /etc/aliases: pcguest: alien

The user pcguest doesn't exist, it is aliased to user alien.

The name of my domain is "allies"
the server on which I run Sendmail is called: galatea.allies
On the same server I run Bind and I have the following zone info on allies:

IN NS galatea
galatea IN A 192.168.0.4
IN MX 10 galatea
www IN A 192.168.0.4
mail IN CNAME galatea
linux-l9cq IN A 192.168.0.3

As you see above mail.allies is a CNAME for galatea.

Now from host linux-l9cq I am emailing to galatea the following scenarios:

email to pcguest@mail.allies ---successfully delivered to
alien@galatea.allies
email to alien@mail.allies ---succesfully delivered to alien@galatea.allies
email to pcguest@galatea.allies ---succesfully delivered to
alien@galatea.allies
email to alien@galatea.allies ---succesfully delivered to
alien@galatea.allies

So far so good.
I change the mta with alternatives --config mta to postfix.

I have the following configuration in /etc/postfix/main.cf

debug_peer_level = 2


debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
xxgdb $daemon_directory/$process_name $process_id & sleep 5


sendmail_path = /usr/sbin/sendmail.postfix

newaliases_path = /usr/bin/newaliases.postfix

mailq_path = /usr/bin/mailq.postfix

setgid_group = postdrop

html_directory = no

manpage_directory = /usr/share/man

sample_directory = /usr/share/doc/postfix-2.3.3/samples

readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES

I have to following lines in access: allies OK, 192.168.0 OK and I have
created the access.db file.

going back the previous 4 scenarios, I have the following results:

email to pcguest@mail.allies ---faillure
The following messages appear in /var/log/maillog:

May 8 21:05:40 galatea postfix/smtpd[16644]: connect from
unknown[192.168.0.3]
May 8 21:05:40 galatea postfix/smtpd[16644]: 3CC994726A2:
client=unknown[192.168.0.3]
May 8 21:05:40 galatea postfix/cleanup[16647]: 3CC994726A2:
message-id=<20080508180615.D225B42C236@linux-l9cq.allies>
May 8 21:05:40 galatea postfix/smtpd[16644]: disconnect from
unknown[192.168.0.3]
May 8 21:05:40 galatea postfix/qmgr[16481]: 3CC994726A2:
from=<alien@linux-l9cq.allies>, size=738442, nrcpt=1 (queue active)
May 8 21:05:40 galatea postfix/smtp[16648]: 3CC994726A2:
to=<pcguest@mail.allies>, relay=none, delay=0.08, delays=0.08/0.01/0/0,
dsn=5.4.6, status=bounced (mail for mail.allies loops back to myself)
May 8 21:05:40 galatea postfix/cleanup[16647]: 51C8F4726A4:
message-id=<20080508180540.51C8F4726A4@galatea.allies>
May 8 21:05:40 galatea postfix/bounce[16649]: 3CC994726A2: sender
non-delivery notification: 51C8F4726A4
May 8 21:05:40 galatea postfix/qmgr[16481]: 51C8F4726A4: from=<>,
size=2457, nrcpt=1 (queue active)
May 8 21:05:40 galatea postfix/qmgr[16481]: 3CC994726A2: removed
May 8 21:06:10 galatea postfix/smtp[16648]: connect to
linux-l9cq.allies[192.168.0.3]: Connection timed out (port 25)
May 8 21:06:10 galatea postfix/smtp[16648]: 51C8F4726A4:
to=<alien@linux-l9cq.allies>, relay=none, delay=30, delays=0/0/30/0,
dsn=4.4.1, status=deferred (connect to linux-l9cq.allies[192.168.0.3]:
Connection timed out)

email to alien@mail.allies ---failure the following messages appear
in /var/log/maillog
May 8 21:08:53 galatea postfix/smtpd[17009]: connect from
unknown[192.168.0.3]
May 8 21:08:53 galatea postfix/smtpd[17009]: 349A74726A2:
client=unknown[192.168.0.3]
May 8 21:08:53 galatea postfix/cleanup[17012]: 349A74726A2:
message-id=<20080508180928.9DB1542C236@linux-l9cq.allies>
May 8 21:08:53 galatea postfix/qmgr[16481]: 349A74726A2:
from=<alien@linux-l9cq.allies>, size=738438, nrcpt=1 (queue active)
May 8 21:08:53 galatea postfix/smtpd[17009]: disconnect from
unknown[192.168.0.3]
May 8 21:08:53 galatea postfix/smtp[17013]: 349A74726A2:
to=<alien@mail.allies>, relay=none, delay=0.08, delays=0.08/0.01/0/0,
dsn=5.4.6, status=bounced (mail for mail.allies loops back to myself)
May 8 21:08:53 galatea postfix/cleanup[17012]: 4DF924726A5:
message-id=<20080508180853.4DF924726A5@galatea.allies>
May 8 21:08:53 galatea postfix/qmgr[16481]: 4DF924726A5: from=<>,
size=2447, nrcpt=1 (queue active)
May 8 21:08:53 galatea postfix/bounce[17014]: 349A74726A2: sender
non-delivery notification: 4DF924726A5
May 8 21:08:53 galatea postfix/qmgr[16481]: 349A74726A2: removed

email to pcguest@galatea.allies ---failure
the following messages appear /var/log/maillog
May 8 21:11:12 galatea postfix/smtpd[17724]: connect from
unknown[192.168.0.3]
May 8 21:11:12 galatea postfix/smtpd[17724]: 611754726A2:
client=unknown[192.168.0.3]
May 8 21:11:12 galatea postfix/cleanup[17727]: 611754726A2:
message-id=<20080508181148.0453042C236@linux-l9cq.allies>
May 8 21:11:12 galatea postfix/qmgr[16481]: 611754726A2:
from=<alien@linux-l9cq.allies>, size=738448, nrcpt=1 (queue active)
May 8 21:11:12 galatea postfix/smtpd[17724]: disconnect from
unknown[192.168.0.3]
May 8 21:11:12 galatea postfix/cleanup[17727]: 7429B4726A6:
message-id=<20080508181148.0453042C236@linux-l9cq.allies>
May 8 21:11:12 galatea postfix/local[17728]: 611754726A2:
to=<pcguest@galatea.allies>, relay=local, delay=0.1,
delays=0.08/0.01/0/0.01, dsn=2.0.0, status=sent (forwarded as 7429B4726A6)
May 8 21:11:12 galatea postfix/qmgr[16481]: 7429B4726A6:
from=<alien@linux-l9cq.allies>, size=738582, nrcpt=1 (queue active)
May 8 21:11:12 galatea postfix/qmgr[16481]: 611754726A2: removed
May 8 21:11:12 galatea postfix/smtp[17729]: 7429B4726A6:
to=<alien@allies.allies>, orig_to=<pcguest@galatea.allies>, relay=none,
delay=0.02, delays=0.01/0.01/0/0, dsn=5.4.4, status=bounced (Host or domain
name not found. Name service error for name=allies.allies type=A: Host not
found)
May 8 21:11:12 galatea postfix/cleanup[17727]: 7B6404726A2:
message-id=<20080508181112.7B6404726A2@galatea.allies>
May 8 21:11:12 galatea postfix/bounce[17730]: 7429B4726A6: sender
non-delivery notification: 7B6404726A2
May 8 21:11:12 galatea postfix/qmgr[16481]: 7B6404726A2: from=<>,
size=2764, nrcpt=1 (queue active)
May 8 21:11:12 galatea postfix/qmgr[16481]: 7429B4726A6: removed

email to alien@galatea.allies ---succesfully delivered to
alien@galatea.allies
the following messages appear in /var/log/maillog
May 8 21:13:28 galatea postfix/smtpd[18136]: connect from
unknown[192.168.0.3]
May 8 21:13:28 galatea postfix/smtpd[18136]: DF5894726A6:
client=unknown[192.168.0.3]
May 8 21:13:28 galatea postfix/cleanup[18139]: DF5894726A6:
message-id=<20080508181404.7B23E42C236@linux-l9cq.allies>
May 8 21:13:28 galatea postfix/qmgr[16481]: DF5894726A6:
from=<alien@linux-l9cq.allies>, size=738444, nrcpt=1 (queue active)
May 8 21:13:28 galatea postfix/smtpd[18136]: disconnect from
unknown[192.168.0.3]
May 8 21:13:29 galatea postfix/local[18140]: DF5894726A6:
to=<alien@galatea.allies>, relay=local, delay=0.1, delays=0.07/0/0/0.03,
dsn=2.0.0, status=sent (delivered to mailbox)
May 8 21:13:29 galatea postfix/qmgr[16481]: DF5894726A6: removed

Why postfix doesn't understand the aliases? I have run the newaliases
command but that dosn't solve the problem.
After all according the configuration postfix reads the aliases
from /usr/bin/newaliases.postfix and this file is a symbolic link
to /usr/sbin/sendmai.postfix.
Why postfix resolves mail.allies badly?
What configuration changes should I make?
Thank you for your help