[SOLVED]Mail problem

[Martini]

Hello.
I have a strange problem with my mail system. I'm using postfix (SSL & non-SSL) and courier (POP3/IMAP SSL & non-SSL). The mail is working fine when I use a webmail interface, but it doesn't work with mail clients. I have Outlook Express and each time I want to send/receive mail (regardless whether I use SSL or not) the program shows a pop-up in which it tells me to type in my login (me@mydomain.tld) and my password. I click OK and the data I provided is fine, but the pop-up appears after a few seconds and again prompts me for login data - it goes like this over and over.
Do you know what might cause such a strange behaviour of mail server?

Please advice,
Martini

P.S. This is my postfix main.cf:

Code:

# ispCP ω (OMEGA) a Virtual Hosting Control Panel
# Copyright (C) 2001-2006 by moleSoftware GmbH - http://www.molesoftware.com
# Copyright (C) 2006-2010 by isp Control Panel - http://ispcp.net
#
# Version: $Id: main.cf 3422 2010-10-07 13:32:14Z nuxwin $
#
# The contents of this file are subject to the Mozilla Public License
# Version 1.1 (the "License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
# License for the specific language governing rights and limitations
# under the License.
#
# The Original Code is "VHCS - Virtual Hosting Control System".
#
# The Initial Developer of the Original Code is moleSoftware GmbH.
# Portions created by Initial Developer are Copyright (C) 2001-2006
# by moleSoftware GmbH. All Rights Reserved.
# Portions created by the ispCP Team are Copyright (C) 2006-2010 by
# isp Control Panel. All Rights Reserved.
#
# The ispCP ω Home Page is:
#
#    http://isp-control.net
#

# Postfix directory settings; These are critical for normal Postfix MTA functionallity
command_directory            = /usr/sbin
daemon_directory             = /usr/lib/postfix

# Some common configuration parameters
inet_interfaces              = all
mynetworks_style             = host

myhostname                   = server.witchermod.org
mydomain                     = server.witchermod.org
myorigin                     = $myhostname

smtpd_banner                 = $myhostname ESMTP ispCP 1.0.7 OMEGA Managed
setgid_group                 = postdrop

# Receiving messages parameters
mydestination                = $myhostname, $mydomain
append_dot_mydomain          = no
append_at_myorigin           = yes
local_transport              = local
virtual_transport            = virtual
transport_maps               = hash:/etc/postfix/ispcp/transport
alias_maps                   = hash:/etc/aliases
alias_database               = hash:/etc/aliases

# Delivering local messages parameters
mail_spool_directory         = /var/mail

# Mailboxquota
# => 0 for unlimited
# => 104857600 for 100 MB
mailbox_size_limit           = 0
mailbox_command              = procmail -a "$EXTENSION"

# Message size limit
# => 0 for unlimited
# => 104857600 for 100 MB
message_size_limit           = 0

biff                         = no
recipient_delimiter          = +

local_destination_recipient_limit = 1
local_recipient_maps         = unix:passwd.byname $alias_database

# ispCP Autoresponder parameters
ispcp-arpl_destination_recipient_limit = 1

# Delivering virtual messages parameters
virtual_mailbox_base         = /var/mail/virtual
virtual_mailbox_limit        = 0

virtual_mailbox_domains      = hash:/etc/postfix/ispcp/domains
virtual_mailbox_maps         = hash:/etc/postfix/ispcp/mailboxes

virtual_alias_maps           = hash:/etc/postfix/ispcp/aliases

virtual_minimum_uid          = 1001
virtual_uid_maps             = static:1001
virtual_gid_maps             = static:8

# SASL paramters
smtpd_sasl_auth_enable       = yes
smtpd_sasl_security_options  = noanonymous
smtpd_sasl_local_domain      =
broken_sasl_auth_clients     = yes

smtpd_helo_required          = yes

smtpd_helo_restrictions      = permit_mynetworks,
                               permit_sasl_authenticated,
                               reject_invalid_helo_hostname,
                               reject_non_fqdn_helo_hostname

smtpd_sender_restrictions    = reject_non_fqdn_sender,
                               reject_unknown_sender_domain,
                               permit_mynetworks,
                               permit_sasl_authenticated

smtpd_recipient_restrictions = reject_non_fqdn_recipient,
                               reject_unknown_recipient_domain,
                               permit_mynetworks,
                               permit_sasl_authenticated,
                               reject_unauth_destination,
                               reject_unlisted_recipient,
                               check_policy_service inet:127.0.0.1:12525,
                               check_policy_service inet:127.0.0.1:10023,
                               permit

smtpd_data_restrictions      = reject_multi_recipient_bounce,
                               reject_unauth_pipelining

# TLS parameters; activate, if avaible/used
#smtpd_tls_security_level    = may
#smtpd_tls_loglevel          = 2
#smtpd_tls_cert_file         = /etc/postfix/cert.pem
#smtpd_tls_key_file          = /etc/postfix/privkey.pem
#smtpd_tls_auth_only         = no
#smtpd_tls_received_header   = yes

# AMaViS parameters; activate, if available/used
#content_filter               = amavis:[127.0.0.1]:10024

# Quota support; activate, if available/used
#virtual_create_maildirsize     = yes
#virtual_mailbox_extended       = yes
#virtual_mailbox_limit_maps     = mysql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cf
#virtual_mailbox_limit_override = yes
#virtual_maildir_limit_message  = "The user you're trying to reach is over mailbox quota."
#virtual_overquota_bounce       = yes

and my mail error log:

Code:

Mar 10 14:19:04 server postfix/master[2139]: daemon started -- version 2.7.1, configuration /etc/postfix
Mar 10 14:20:46 server authdaemond: modules="authpam", daemons=5
Mar 10 14:20:46 server authdaemond: Installing libauthpam
Mar 10 14:20:46 server authdaemond: Installation complete: authpam
Mar 10 14:20:55 server postfix/policyd-weight[15384]: policyd-weight 0.1.15 devel-1 started and daemonized. conf:default set$
Mar 10 14:20:55 server postfix/policyd-weight[15384]: warning: cache_query: $csock couln't be created: connect: No such file$
Mar 10 14:20:55 server postfix/policyd-weight[15385]: cache spawned
Mar 10 14:20:57 server postgrey[15597]: Process Backgrounded
Mar 10 14:20:57 server postgrey[15597]: 2011/03/10-14:20:57 postgrey (type Net::Server::Multiplex) starting! pid(15597)
Mar 10 14:20:57 server postgrey[15597]: Binding to TCP port 10023 on host localhost#012
Mar 10 14:20:57 server postgrey[15597]: Setting gid to "113 113"
Mar 10 14:20:57 server postgrey[15597]: Setting uid to "109"
Mar 10 14:24:17 server postfix/master[2139]: terminating on signal 15
Mar 10 14:25:34 server postfix/master[22636]: daemon started -- version 2.7.1, configuration /etc/postfix
Mar 10 14:30:02 server postfix/pickup[22643]: B350E33C31E: uid=33 from=<www-data>
Mar 10 14:30:02 server postfix/cleanup[22674]: B350E33C31E: message-id=<20110310133002.B350E33C31E@server1.example.com>
Mar 10 14:30:02 server postfix/qmgr[22644]: B350E33C31E: from=<www-data@server.witchermod.org>, size=874, nrcpt=1 (queue act$
Mar 10 14:30:03 server postfix/local[22676]: B350E33C31E: to=<www-data@server.witchermod.org>, orig_to=<www-data>, relay=loc$
Mar 10 14:30:03 server postfix/qmgr[22644]: B350E33C31E: removed
Mar 10 14:33:55 server postfix/master[22636]: terminating on signal 15
Mar 10 14:33:56 server postfix/master[22801]: daemon started -- version 2.7.1, configuration /etc/postfix
Mar 10 14:34:07 server postfix/smtpd[22838]: connect from localhost.localdomain[127.0.0.1]
Mar 10 14:34:45 server postfix/smtpd[22838]: disconnect from localhost.localdomain[127.0.0.1]
Mar 10 14:38:30 server postfix/master[22801]: terminating on signal 15
Mar 10 14:38:30 server postfix/master[23277]: daemon started -- version 2.7.1, configuration /etc/postfix
Mar 10 14:40:02 server postfix/pickup[23283]: EA03433C333: uid=33 from=<www-data>
Mar 10 14:40:02 server postfix/cleanup[23598]: EA03433C333: message-id=<20110310134002.EA03433C333@server.witchermod.org>
Mar 10 14:40:02 server postfix/qmgr[23284]: EA03433C333: from=<www-data@server.witchermod.org>, size=876, nrcpt=1 (queue act$
Mar 10 14:40:02 server postfix/local[23600]: warning: maildir access problem for UID/GID=33/33: create maildir file /var/www$
Mar 10 14:40:02 server postfix/local[23600]: warning: perhaps you need to create the maildirs in advance
Mar 10 14:40:03 server postfix/local[23600]: EA03433C333: to=<www-data@server.witchermod.org>, orig_to=<www-data>, relay=loc$
Mar 10 14:40:03 server postfix/cleanup[23598]: 0089033C335: message-id=<20110310134003.0089033C335@server.witchermod.org>
Mar 10 14:40:03 server postfix/qmgr[23284]: 0089033C335: from=<>, size=3007, nrcpt=1 (queue active)
Mar 10 14:40:03 server postfix/bounce[23601]: EA03433C333: sender non-delivery notification: 0089033C335
Mar 10 14:40:03 server postfix/qmgr[23284]: EA03433C333: removed
Mar 10 14:40:03 server postfix/local[23600]: warning: maildir access problem for UID/GID=33/33: create maildir file /var/www$
Mar 10 14:40:03 server postfix/local[23600]: warning: perhaps you need to create the maildirs in advance
Mar 10 14:40:03 server postfix/local[23600]: 0089033C335: to=<www-data@server.witchermod.org>, relay=local, delay=0.02, dela$
Mar 10 14:40:03 server postfix/qmgr[23284]: 0089033C335: removed