Problem with Cyrus and client (such thunderbird, Outlook)

[sandro]

Hallo all,
I'm new to this mailing, this is my first post.
I have a problem with Cyrus.
I can't get mail from thunderbird or outlook.

I run cyrus in a linux box (SuSe 10.2) with postfix, amavis-new, clamav.
This is my conf:

postmaster: postmaster
configdirectory: /var/lib/imap
partition-default: /var/spool/imap
sievedir: /var/lib/sieve
admins: cyrus
allowanonymouslogin: no
allowplaintext: yes
autocreatequota: 10000
servername: dba.it
altnamespace: yes
reject8bit: no
quotawarn: 90
timeout: 30
poptimeout: 10
dracinterval: 0
drachost: localhost
lmtp_overquota_perm_failure: no
lmtp_downcase_rcpt: yes
sasl_pwcheck_method: saslauthd

Any idea??
P.S
Sorry for my english.