Postfix+Dovecot+Squirell mail can not send or recieve

I am new to postfix , I have compiled postfix from scratch to include the pgsql, and tls driver, and I have installed the dovecot and squirrel packages and configured them as far as possible on Centos 6.3 based server, my traget is to be to send and receive emails from my domain using squirell we interface, but I am getting the following:
On regular basis as long as I am logged in the squirell mail I keep having:

    Dec 15 19:23:36 myserver dovecot: auth: pgsql: Connected to postfix
    Dec 15 19:23:36 myserver dovecot: imap-login: Login: user=<me@mydomain.nl>,method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=30914, TLS
    Dec 15 19:23:36 myserver dovecot: imap(me@mydomain.nl): Connection closed bytes=46/364

And when trying to send a message I am getting:

    warning: request to update table btree:/var/spool/postfix/smtpd_tls_session_cache in non-postfi directory /var/spool/postfix
    Dec 15 18:33:37 myserver postfix/tlsmgr[30573]: warning: redirecting the request to postfix-owned data_directory /var/lib/postfix
    Dec 15 18:33:37 myserver postfix/smtpd[30571]: connect from localhost.localdomain[127.0.0.1]
    Dec 15 18:33:37 myserver postfix/smtpd[30571]: lost connection after UNKNOWN from localhost.localdomain[127.0.0.1]
    Dec 15 18:33:37 myserver postfix/smtpd[30571]: disconnect from localhost.localdomain[127.0.0.1]

So I can see that I have the following problems (Until now :-) ):<br>
     1- Not able to send an email for this UNKOWN issue.<br>
     2- Send password in plain and encrypted over TLS.<br>
     3-  Issue in updating the table btree.<br>
     4- Issue in redirecting the request to postfx-owned data directory<br>
I am not sure if they are all related, and if it is ok to post them in one post.<br>
My configurations are:<br>
Main.cf:

    alias_database = hash:/etc/aliases
    alias_maps = hash:/etc/aliases
    broken_sasl_auth_clients = yes
    command_directory = /usr/sbin
    config_directory = /etc/postfix
    daemon_directory = /usr/libexec/postfix
    data_directory = /var/lib/postfix
    debug_peer_level = 2
    html_directory = no
    smtpd_recipient_restrictions = permit_sasl_authenticated
    inet_interfaces = all
    inet_protocols = all
    mail_owner = postfix
    mailq_path = /usr/bin/mailq.postfix
    manpage_directory = /usr/share/man
    mydestination = localhost mydomain.com
    myhostname = mydomain.com
    mynetworks = <My public IP>/32, $myhostname
    newaliases_path = /usr/bin/newaliases.postfix
    queue_directory = /var/spool/postfix
    readme_directory = /usr/share/doc/postfix-2.10.2/README_FILES
    sample_directory = no
    sendmail_path = /usr/sbin/sendmail.postfix
    setgid_group = postdrop
    smtpd_banner = $myhostname ESMTP $mail_name
    smtpd_recipient_restrictions = permit_mynetworks,  permit_sasl_authenticated,
    reject_unauth_destination, permit
    smtpd_sasl_auth_enable = yes
    smtpd_sasl_exceptions_networks = $mynetworks
    smtpd_sasl_path = private/auth
    smtpd_sasl_security_options = noanonymous
    smtpd_sasl_type = dovecot
    smtpd_sender_restrictions = permit_mynetworks,  permit_sasl_authenticated,
    reject_unauth_destination, permit
    smtpd_tls_auth_only = no
    smtpd_tls_cert_file = /etc/ssl/mailserver/myserver_com.pem
    smtpd_tls_key_file = /etc/ssl/mailserver/myserver_com.key
    smtpd_tls_loglevel = 0
    smtpd_tls_received_header = no
    smtpd_tls_session_cache_database = btree:/var/spool/postfix/smtpd_tls_session_cache
    smtpd_use_tls = yes
    tls_random_source = dev:/dev/urandom
    unknown_local_recipient_reject_code = 550
    virtual_alias_maps = pgsql:$config_directory/pgsql_virtual_alias_maps.cf
    virtual_gid_maps = static:500
    virtual_mailbox_base = /var/vmail
    virtual_mailbox_domains = proxy:pgsql:$config_directory/pgsql_virtual_domains_maps.cf
    virtual_mailbox_maps = proxy:pgsql:$config_directory/pgsql_virtual_mailbox_maps.cf
    virtual_minimum_uid = 500
    virtual_transport = dovecot
    virtual_uid_maps = static:500
    #use amavisd as filter on port 10024
    content_filter=amavisfeed:[127.0.0.1]:10024

Master.cf:

    smtp      inet  n       -       n       -       -       smtpd
    submission inet n       -       n       -       -       smtpd
    smtps     inet  n       -       n       -       -       smtpd
    pickup    unix  n       -       n       60      1       pickup
    cleanup   unix  n       -       n       -       0       cleanup
    qmgr      unix  n       -       n       300     1       qmgr
    tlsmgr    unix  -       -       n       1000?   1       tlsmgr
    rewrite   unix  -       -       n       -       -       trivial-rewrite
    bounce    unix  -       -       n       -       0       bounce
    defer     unix  -       -       n       -       0       bounce
    trace     unix  -       -       n       -       0       bounce
    verify    unix  -       -       n       -       1       verify
    flush     unix  n       -       n       1000?   0       flush
    proxymap  unix  -       -       n       -       -       proxymap
    proxywrite unix -       -       n       -       1       proxymap
    smtp      unix  -       -       n       -       -       smtp
    relay     unix  -       -       n       -       -       smtp
    showq     unix  n       -       n       -       -       showq
    error     unix  -       -       n       -       -       error
    retry     unix  -       -       n       -       -       error
    discard   unix  -       -       n       -       -       discard
    local     unix  -       n       n       -       -       local
    virtual   unix  -       n       n       -       -       virtual
    lmtp      unix  -       -       n       -       -       lmtp
    anvil     unix  -       -       n       -       1       anvil
    scache    unix  -       -       n       -       1       scache
    dovecot unix - n n - - pipe flags=DRhu user=vmail:mail argv=/usr/libexec/dovecot/deliver
    -d $(recipient)
    amavisfeed unix    -       -       n        -      2     lmtp
    -o lmtp_data_done_timeout=1200
    -o lmtp_send_xforward_command=yes
    -o lmtp_tls_note_starttls_offer=no
    127.0.0.1:10025 inet n    -       n       -       -     smtpd
    -o content_filter=
    -o smtpd_delay_reject=no
    -o smtpd_client_restrictions=permit_mynetworks,reject
    -o smtpd_helo_restrictions=
    -o smtpd_sender_restrictions=
    -o smtpd_recipient_restrictions=permit_mynetworks,reject
    -o smtpd_data_restrictions=reject_unauth_pipelining
    -o smtpd_end_of_data_restrictions=
    -o smtpd_restriction_classes=
    -o mynetworks=127.0.0.0/8
    -o smtpd_error_sleep_time=0
    -o smtpd_soft_error_limit=1001
    -o smtpd_hard_error_limit=1000
    -o smtpd_client_connection_count_limit=0
    -o smtpd_client_connection_rate_limit=0
    -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_milters
    -o local_header_rewrite_clients=
    -o smtpd_milters=
    -o local_recipient_maps=
    -o relay_recipient_maps=

 pgsql_virtual_alias_maps.cf

    user = postfix
    password = <Password>
    hosts = localhost
    dbname = postfix
    table = alias
    select_field = goto
    where_field = address
    additional_conditions = and active = '1'
    #query = SELECT goto FROM alias WHERE address='%s' AND active = '1'

pgsql_virtual_domains_maps.cf

    user = postfix
    password = <Password>
    hosts = localhost
    dbname = postfix
    table = domain
    select_field = domain
    where_field = domain
    additional_conditions = and backupmx = '0' and active = '1'
    #query = SELECT domain FROM domain WHERE domain='%s' AND backupmx = '0' AND active = '1'

pgsql_virtual_mailbox_limit_maps.cf

    user = postfix
    password = <Password>
    hosts = localhost
    dbname = postfix
    table = mailbox
    select_field = quota
    where_field = username
    additional_conditions = and active = '1'
    #query = SELECT quota FROM mailbox WHERE username='%s' AND active = '1'

pgsql_virtual_mailbox_maps.cf

    user = postfix
    password = <Password>
    hosts = localhost
    dbname = postfix
    table = mailbox
    select_field = maildir
    where_field = username
    additional_conditions = and active = '1'
    #query = SELECT maildir FROM mailbox WHERE username='%s' AND active = '1'

Dovecot.conf

    # 2.0.9: /etc/dovecot/dovecot.conf
    # OS: Linux 2.6.18-028stab101.1 x86_64 CentOS release 6.3 (Final) reiserfs
    base_dir = /var/run/dovecot/
    disable_plaintext_auth = yes
    first_valid_uid = 500
    last_valid_uid = 500
    log_timestamp = "%d-%m-%y %H:%M:%S "
    mail_access_groups = mail
    mail_location = maildir:/home/vmail/%u
    mail_max_userip_connections = 100
    mail_privileged_group = mail
    mbox_write_locks = fcntl
    passdb {
    driver = pam
    }
    passdb {
    args = /etc/dovecot/dovecot-sql.conf
    driver = sql
    }
    protocols = pop3 imap
    protocol pop3 {
    pop3_uidl_format = %08Xu%08Xv
    pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
    }
    service auth-worker {
    user = vmail
    }
    service auth {
    unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
    }
    unix_listener auth-master {
    mode = 0666
    }
    user = $default_internal_user
    }
    service imap-login {
    executable = /usr/libexec/dovecot/imap-login
    inet_listener imap {
    address = *
    port = 143
    }
    inet_listener imaps {
    address = *
    port = 993
    }
    }
    service imap {
    executable = /usr/libexec/dovecot/imap
    }
    service pop3 {
    executable = /usr/libexec/dovecot/pop3
    }
    ssl_cert = </etc/ssl/mailserver/mail.mydomain.com.pem
    ssl_key = </etc/ssl/mailserver/mail.mydomain.com.key
    userdb {
    driver = passwd
    }
    userdb {
    args = /etc/dovecot/dovecot-sql.conf
    driver = sql
    }
    protocol lda {
    auth_socket_path = /var/run/dovecot/auth-master
    postmaster_address = postmaster@mydomain.com
    sendmail_path = /usr/lib/sendmail
    }
    protocol imap {
    imap_max_line_length = 64 k
    }

dovecot-sql.conf

    driver = pgsql
    connect = host=localhost dbname=postfix user=postfix password=<Password>
    password_query =  SELECT username as user, password, '/home/vmail/%n'||'@'||'%d' as userdb_home, 'maildir:/var/vmail/%n'||'@'||'%d' as userdb_mail, 500 as userdb_uid, 500 as userdb_gid FROM mailbox WHERE username = '%n'||'@'||'%d' AND active = '1'
    user_query = select '/home/vmail/%n'  as home, 'maildir:/home/vmail/'||'%n' as mail , 500 As uid , 500 as gid, 'dirsize:storage=' || quota AS quota from mailbox where username=' n'||'@'||'%d'
    # For using doveadm -A:
    iterate_query = SELECT username, domain FROM mailbox where username='%n'||'@'||'%d'

Can someone guide me please?