dovecot debug message help required

[Rajesh M]

hi

i was carrying out some testing using qmailtoaster with dovecot on a centos 64 server

i am connecting to the mailbox using a windows machine with outlook across the lan.

the mailbox is around 7gb in size with around 12000 emails spread across multiple folders and i am trying to sync the mailbox folders to by creating an account imap account in outlook.

the mails are getting downloaded in the imap folder but the sync does not complete and outlook throws an error.
Task 'Synchronizing subscribed folders for user at mydomain.com.' reported error (0x800CCC0F) : 'Outlook cannot synchronize subscribed folders for user at mydomain.com.. Error: The TCP/IP connection was unexpectedly terminated by the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

in the dovecot log i see the following.

Apr 10 17:12:10 imap(user at mydomain.com): Debug: Effective uid=89, gid=89, home=/home/vpopmail/domains/mydomain.com/user
Apr 10 17:12:10 imap(user at mydomain.com): Debug: Quota root: name=ignore=Trash backend=maildir args=
Apr 10 17:12:10 imap(user at mydomain.com): Debug: Quota rule: root=ignore=Trash mailbox=? bytes=0 messages=0
Apr 10 17:12:10 imap(user at mydomain.com): Debug: Quota grace: root=ignore=Trash bytes=0 (10%)
Apr 10 17:12:10 imap(user at mydomain.com): Debug: Namespace : type=private, prefix=, sep=., inbox=yes, hidden=no, list=yes, subscriptions=yes location=
Apr 10 17:12:10 imap(user at mydomain.com): Debug: mdbox: access(/home/vpopmail/domains/mydomain.com/user/mdbox, rwx): failed: No such file or directory
Apr 10 17:12:10 imap(user at mydomain.com): Debug: mdbox: couldn't find root dir
Apr 10 17:12:10 imap(user at mydomain.com): Debug: sdbox: access(/home/vpopmail/domains/mydomain.com/user/sdbox, rwx): failed: No such file or directory
Apr 10 17:12:10 imap(user at mydomain.com): Debug: sdbox: couldn't find root dir
Apr 10 17:12:10 imap(user at mydomain.com): Debug: maildir: root exists (/home/vpopmail/domains/mydomain.com/user/Maildir)
Apr 10 17:12:10 imap(user at mydomain.com): Debug: maildir++: root=/home/vpopmail/domains/mydomain.com/user/Maildir, index=, indexpvt=, control=, inbox=/home/vpopmail/domains/mydomain.com/user/Maildir, alt=
Apr 10 17:12:40 imap(user at mydomain.com): Info: Disconnected: Logged out in=28 out=460

i would like to know what the following means -- specifically mdbox and sdbox

####################
Apr 10 17:12:10 imap(user at mydomain.com): Debug: mdbox: access(/home/vpopmail/domains/mydomain.com/user/mdbox, rwx): failed: No such file or directory
Apr 10 17:12:10 imap(user at mydomain.com): Debug: mdbox: couldn't find root dir
Apr 10 17:12:10 imap(user at mydomain.com): Debug: sdbox: access(/home/vpopmail/domains/mydomain.com/user/sdbox, rwx): failed: No such file or directory
Apr 10 17:12:10 imap(user at mydomain.com): Debug: sdbox: couldn't find root dir
####################

my dovecot config file

# dovecot -n

# 2.2.7: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.el6.x86_64 x86_64 CentOS release 6.5 (Final)
auth_cache_size = 32 M
auth_mechanisms = plain login digest-md5 cram-md5
default_login_user = vpopmail
disable_plaintext_auth = no
first_valid_gid = 89
first_valid_uid = 89
log_path = /var/log/dovecot.log
login_greeting = Dovecot toaster ready.
mail_debug = yes
mail_max_userip_connections = 50
mail_plugins = " quota"
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
namespace {
  inbox = yes
  location =
  prefix =
  separator = .
  type = private
}
passdb {
  args = cache_key=%u webmail=127.0.0.1
  driver = vpopmail
}
plugin {
  quota = maildir:ignore=Trash
  quota_rule = ?:storage=0
}
protocols = imap pop3
service imap-login {
  client_limit = 1000
  process_limit = 400
  process_min_avail = 4
  service_count = 0
  vsz_limit = 512 M
}
service pop3-login {
  client_limit = 1000
  process_limit = 400
  process_min_avail = 12
  service_count = 0
  vsz_limit = 512 M
}
ssl_cert = </var/qmail/control/servercert.pem
ssl_dh_parameters_length = 2048
ssl_key = </var/qmail/control/servercert.pem
userdb {
  args = cache_key=%u quota_template=quota_rule=*:backend=%q
  driver = vpopmail
}
protocol imap {
  imap_client_workarounds = delay-newmail
  mail_plugins = " quota imap_quota"
}
protocol pop3 {
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_fast_size_lookups = yes
  pop3_lock_session = no
  pop3_no_flag_updates = yes
}


thank you,

rajesh