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Old 21st January 2012, 01:29
m.xander m.xander is offline
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Quote:
It would be worth having a look at the Dovecot configuration, too, so please post /etc/dovecot/dovecot.conf.
/etc/dovecot/dovecot.conf
[CODE]## Dovecot configuration file

# If you're in a hurry, see http://wiki.dovecot.org/QuickConfiguration

# "dovecot -n" command gives a clean output of the changed settings. Use it
# instead of copy&pasting this file when posting to the Dovecot mailing list.

# '#' character and everything after it is treated as comments. Extra spaces
# and tabs are ignored. If you want to use either of these explicitly, put the
# value inside quotes, eg.: key = "# char and trailing whitespace "

# Default values are shown for each setting, it's not required to uncomment
# those. These are exceptions to this though: No sections (e.g. namespace {})
# or plugin settings are added by default, they're listed only as examples.
# Paths are also just examples with the real defaults being based on configure
# options. The paths listed here are for configure --prefix=/usr
# --sysconfdir=/etc --localstatedir=/var --with-ssldir=/etc/ssl

# Base directory where to store runtime data.
#base_dir = /var/run/dovecot

# Protocols we want to be serving: imap imaps pop3 pop3s managesieve
# If you only want to use dovecot-auth, you can set this to "none".
#protocols = imap imaps
protocols = imap imaps pop3 pop3s

# A space separated list of IP or host addresses where to listen in for
# connections. "*" listens in all IPv4 interfaces. "[::]" listens in all IPv6
# interfaces. Use "*, [::]" for listening both IPv4 and IPv6.
#
# If you want to specify ports for each service, you will need to configure
# these settings inside the protocol imap/pop3/managesieve { ... } section,
# so you can specify different ports for IMAP/POP3/MANAGESIEVE. For example:
# protocol imap {
# listen = *:10143
# ssl_listen = *:10943
# ..
# }
# protocol pop3 {
# listen = *:10100
# ..
# }
# protocol managesieve {
# listen = *:12000
# ..
# }
#listen = *

# Disable LOGIN command and all other plaintext authentications unless
# SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP
# matches the local IP (ie. you're connecting from the same computer), the
# connection is considered secure and plaintext authentication is allowed.
#disable_plaintext_auth = yes

# Should all IMAP and POP3 processes be killed when Dovecot master process
# shuts down. Setting this to "no" means that Dovecot can be upgraded without
# forcing existing client connections to close (although that could also be
# a problem if the upgrade is eg. because of a security fix). This however
# means that after master process has died, the client processes can't write
# to log files anymore.
#shutdown_clients = yes

##
## Logging
##

# Log file to use for error messages, instead of sending them to syslog.
# /dev/stderr can be used to log into stderr.
#log_path =

# Log file to use for informational and debug messages.
# Default is the same as log_path.
#info_log_path =

# Prefix for each line written to log file. % codes are in strftime(3)
# format.
#log_timestamp = "%b %d %H:%M:%S "
log_timestamp = "%Y-%m-%d %H:%M:%S "

# Syslog facility to use if you're logging to syslog. Usually if you don't
# want to use "mail", you'll use local0..local7. Also other standard
# facilities are supported.
#syslog_facility = mail

##
## SSL settings
##

# IP or host address where to listen in for SSL connections. Remember to also
# add imaps and/or pop3s to protocols setting. Defaults to same as "listen"
# setting if not specified.
#ssl_listen =

# SSL/TLS support: yes, no, required. </usr/share/doc/dovecot-common/wiki/SSL.txt>
#ssl = yes

# PEM encoded X.509 SSL/TLS certificate and private key. They're opened before
# dropping root privileges, so keep the key file unreadable by anyone but
# root.
#ssl_cert_file = /etc/ssl/certs/dovecot.pem
#ssl_key_file = /etc/ssl/private/dovecot.pem

# If key file is password protected, give the password here. Alternatively
# give it when starting dovecot with -p parameter. Since this file is often
# world-readable, you may want to place this setting instead to a different
# root owned 0600 file by using !include_try <path>.
#ssl_key_password =

# File containing trusted SSL certificate authorities. Set this only if you
# intend to use ssl_verify_client_cert=yes. The CAfile should contain the
# CA-certificate(s) followed by the matching CRL(s).
#ssl_ca_file =

# Request client to send a certificate. If you also want to require it, set
# ssl_require_client_cert=yes in auth section.
#ssl_verify_client_cert = no

# Which field from certificate to use for username. commonName and
# x500UniqueIdentifier are the usual choices. You'll also need to set
# ssl_username_from_cert=yes.
#ssl_cert_username_field = commonName

# How often to regenerate the SSL parameters file. Generation is quite CPU
# intensive operation. The value is in hours, 0 disables regeneration
# entirely.
#ssl_parameters_regenerate = 168

# SSL ciphers to use
#ssl_cipher_list = ALL:!LOW:!SSLv2

# Show protocol level SSL errors.
#verbose_ssl = no

##
## Login processes
##

# </usr/share/doc/dovecot-common/wiki/LoginProcess.txt>

# Directory where authentication process places authentication UNIX sockets
# which login needs to be able to connect to. The sockets are created when
# running as root, so you don't have to worry about permissions. Note that
# everything in this directory is deleted when Dovecot is started.
#login_dir = /var/run/dovecot/login

# chroot login process to the login_dir. Only reason not to do this is if you
# wish to run the whole Dovecot without roots. </usr/share/doc/dovecot-common/wiki/Rootless.txt>
#login_chroot = yes

# User to use for the login process. Create a completely new user for this,
# and don't use it anywhere else. The user must also belong to a group where
# only it has access, it's used to control access for authentication process.
# Note that this user is NOT used to access mails. </usr/share/doc/dovecot-common/wiki/UserIds.txt>
#login_user = dovecot

# Set max. process size in megabytes. If you don't use
# login_process_per_connection you might need to grow this.
#login_process_size = 64

# Should each login be processed in it's own process (yes), or should one
# login process be allowed to process multiple connections (no)? Yes is more
# secure, espcially with SSL/TLS enabled. No is faster since there's no need
# to create processes all the time.
#login_process_per_connection = yes

# Number of login processes to keep for listening new connections.
#login_processes_count = 3

# Maximum number of login processes to create. The listening process count
# usually stays at login_processes_count, but when multiple users start logging
# in at the same time more extra processes are created. To prevent fork-bombing
# we check only once in a second if new processes should be created - if all
# of them are used at the time, we double their amount until the limit set by
# this setting is reached.
#login_max_processes_count = 128

# Maximum number of connections allowed per each login process. This setting
# is used only if login_process_per_connection=no. Once the limit is reached,
# the process notifies master so that it can create a new login process.
#login_max_connections = 256

# Greeting message for clients.
#login_greeting = Dovecot ready.

# Space separated list of trusted network ranges. Connections from these
# IPs are allowed to override their IP addresses and ports (for logging and
# for authentication checks). disable_plaintext_auth is also ignored for
# these networks. Typically you'd specify your IMAP proxy servers here.
#login_trusted_networks =

# Space-separated list of elements we want to log. The elements which have
# a non-empty variable value are joined together to form a comma-separated
# string.
#login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c

# Login log format. %$ contains login_log_format_elements string, %s contains
# the data we want to log.
#login_log_format = %$: %s

##
## Mailbox locations and namespaces
##

# Location for users' mailboxes. This is the same as the old default_mail_env
# setting. The default is empty, which means that Dovecot tries to find the
# mailboxes automatically. This won't work if the user doesn't have any mail
# yet, so you should explicitly tell Dovecot the full location.
#
# If you're using mbox, giving a path to the INBOX file (eg. /var/mail/%u)
# isn't enough. You'll also need to tell Dovecot where the other mailboxes are
# kept. This is called the "root mail directory", and it must be the first
# path given in the mail_location setting.
#
# There are a few special variables you can use, eg.:
#
# %u - username
# %n - user part in user@domain, same as %u if there's no domain
# %d - domain part in user@domain, empty if there's no domain
# %h - home directory
#
# See </usr/share/doc/dovecot-common/wiki/Variables.txt> for full list.
# Some examples:
#
# mail_location = maildir:~/Maildir
# mail_location = mbox:~/mail:INBOX=/var/mail/%u
# mail_location = mbox:/var/mail/%d/%1n/%n:INDEX=/var/indexes/%d/%1n/%n
#
# </usr/share/doc/dovecot-common/wiki/MailLocation.txt>
#
#mail_location =

# If you need to set multiple mailbox locations or want to change default
# namespace settings, you can do it by defining namespace sections.
#
# You can have private, shared and public namespaces. Private namespaces
# are for user's personal mails. Shared namespaces are for accessing other
# users' mailboxes that have been shared. Public namespaces are for shared
# mailboxes that are managed by sysadmin. If you create any shared or public
# namespaces you'll typically want to enable ACL plugin also, otherwise all
# users can access all the shared mailboxes, assuming they have permissions
# on filesystem level to do so.
#
# REMEMBER: If you add any namespaces, the default namespace must be added
# explicitly, ie. mail_location does nothing unless you have a namespace
# without a location setting. Default namespace is simply done by having a
# namespace with empty prefix.
#namespace private {
# Hierarchy separator to use. You should use the same separator for all
# namespaces or some clients get confused. '/' is usually a good one.
# The default however depends on the underlying mail storage format.
#separator =

# Prefix required to access this namespace. This needs to be different for
# all namespaces. For example "Public/".
#prefix =

# Physical location of the mailbox. This is in same format as
# mail_location, which is also the default for it.
#location =

# There can be only one INBOX, and this setting defines which namespace
# has it.
#inbox = no

# If namespace is hidden, it's not advertised to clients via NAMESPACE
# extension. You'll most likely also want to set list=no. This is mostly
# useful when converting from another server with different namespaces which
# you want to deprecate but still keep working. For example you can create
# hidden namespaces with prefixes "~/mail/", "~%u/mail/" and "mail/".
#hidden = yes

# Show the mailboxes under this namespace with LIST command. This makes the
# namespace visible for clients that don't support NAMESPACE extension.
# "children" value lists child mailboxes, but hides the namespace prefix.
#list = yes

# Namespace handles its own subscriptions. If set to "no", the parent
# namespace handles them (empty prefix should always have this as "yes")
#subscriptions = yes
#}

# Example shared namespace configuration
#namespace shared {
#separator = /

# Mailboxes are visible under "shared/user@domain/"
# %%n, %%d and %%u are expanded to the destination user.
#prefix = shared/%%u/

# Mail location for other users' mailboxes. Note that %variables and ~/
# expands to the logged in user's data. %%n, %%d, %%u and %%h expand to the
# destination user's data.
#location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u

# Use the default namespace for saving subscriptions.
#subscriptions = no

# List the shared/ namespace only if there are visible shared mailboxes.
#list = children
#}

# System user and group used to access mails. If you use multiple, userdb
# can override these by returning uid or gid fields. You can use either numbers
# or names. </usr/share/doc/dovecot-common/wiki/UserIds.txt>
#mail_uid =
#mail_gid =

# Group to enable temporarily for privileged operations. Currently this is
# used only with INBOX when either its initial creation or dotlocking fails.
# Typically this is set to "mail" to give access to /var/mail.
#mail_privileged_group =
mail_privileged_group = mail

# Grant access to these supplementary groups for mail processes. Typically
# these are used to set up access to shared mailboxes. Note that it may be
# dangerous to set these if users can create symlinks (e.g. if "mail" group is
# set here, ln -s /var/mail ~/mail/var could allow a user to delete others'
# mailboxes, or ln -s /secret/shared/box ~/mail/mybox would allow reading it).
#mail_access_groups =

# Allow full filesystem access to clients. There's no access checks other than
# what the operating system does for the active UID/GID. It works with both
# maildir and mboxes, allowing you to prefix mailboxes names with eg. /path/
# or ~user/.
#mail_full_filesystem_access = no

##
## Mail processes
##

# Enable mail process debugging. This can help you figure out why Dovecot
# isn't finding your mails.
#mail_debug = no

# Log prefix for mail processes. See </usr/share/doc/dovecot-common/wiki/Variables.txt>
# for list of possible variables you can use.
#mail_log_prefix = "%Us(%u): "

# Max. number of lines a mail process is allowed to log per second before it's
# throttled. 0 means unlimited. Typically there's no need to change this
# unless you're using mail_log plugin, which may log a lot. This setting is
# ignored while mail_debug=yes to avoid pointless throttling.
#mail_log_max_lines_per_sec = 10

# Don't use mmap() at all. This is required if you store indexes to shared
# filesystems (NFS or clustered filesystem).
#mmap_disable = no

# Rely on O_EXCL to work when creating dotlock files. NFS supports O_EXCL
# since version 3, so this should be safe to use nowadays by default.
#dotlock_use_excl = yes

# Don't use fsync() or fdatasync() calls. This makes the performance better
# at the cost of potential data loss if the server (or the file server)
# goes down.
#fsync_disable = no

# Mail storage exists in NFS. Set this to yes to make Dovecot flush NFS caches
# whenever needed. If you're using only a single mail server this isn't needed.
#mail_nfs_storage = no
# Mail index files also exist in NFS. Setting this to yes requires
# mmap_disable=yes and fsync_disable=no.
#mail_nfs_index = no

# Locking method for index files. Alternatives are fcntl, flock and dotlock.
# Dotlocking uses some tricks which may create more disk I/O than other locking
# methods. NFS users: flock doesn't work, remember to change mmap_disable.
#lock_method = fcntl

# Drop all privileges before exec()ing the mail process. This is mostly
# meant for debugging, otherwise you don't get core dumps. It could be a small
# security risk if you use single UID for multiple users, as the users could
# ptrace() each others processes then.
#mail_drop_priv_before_exec = no

# Show more verbose process titles (in ps). Currently shows user name and
# IP address. Useful for seeing who are actually using the IMAP processes
# (eg. shared mailboxes or if same uid is used for multiple accounts).
#verbose_proctitle = no

# Valid UID range for users, defaults to 500 and above. This is mostly
# to make sure that users can't log in as daemons or other system users.
# Note that denying root logins is hardcoded to dovecot binary and can't
# be done even if first_valid_uid is set to 0.
#first_valid_uid = 500
#last_valid_uid = 0

# Valid GID range for users, defaults to non-root/wheel. Users having
# non-valid GID as primary group ID aren't allowed to log in. If user
# belongs to supplementary groups with non-valid GIDs, those groups are
# not set.
#first_valid_gid = 1
#last_valid_gid = 0

# Maximum number of running mail processes. When this limit is reached,
# new users aren't allowed to log in.
#max_mail_processes = 512

# Set max. process size in megabytes. Most of the memory goes to mmap()ing
# files, so it shouldn't harm much even if this limit is set pretty high.
#mail_process_size = 256

# Maximum allowed length for mail keyword name. It's only forced when trying
# to create new keywords.
#mail_max_keyword_length = 50

# ':' separated list of directories under which chrooting is allowed for mail
# processes (ie. /var/mail will allow chrooting to /var/mail/foo/bar too).
# This setting doesn't affect login_chroot, mail_chroot or auth chroot
# settings. If this setting is empty, "/./" in home dirs are ignored.
# WARNING: Never add directories here which local users can modify, that
# may lead to root exploit. Usually this should be done only if you don't
# allow shell access for users. </usr/share/doc/dovecot-common/wiki/Chrooting.txt>
#valid_chroot_dirs =

# Default chroot directory for mail processes. This can be overridden for
# specific users in user database by giving /./ in user's home directory
# (eg. /home/./user chroots into /home). Note that usually there is no real
# need to do chrooting, Dovecot doesn't allow users to access files outside
# their mail directory anyway. If your home directories are prefixed with
# the chroot directory, append "/." to mail_chroot. </usr/share/doc/dovecot-common/wiki/Chrooting.txt>
#mail_chroot =

##
## Mailbox handling optimizations
##

# The minimum number of mails in a mailbox before updates are done to cache
# file. This allows optimizing Dovecot's behavior to do less disk writes at
# the cost of more disk reads.
#mail_cache_min_mail_count = 0

# When IDLE command is running, mailbox is checked once in a while to see if
# there are any new mails or other changes. This setting defines the minimum
# time in seconds to wait between those checks. Dovecot can also use dnotify,
# inotify and kqueue to find out immediately when changes occur.
#mailbox_idle_check_interval = 30

# Save mails with CR+LF instead of plain LF. This makes sending those mails
# take less CPU, especially with sendfile() syscall with Linux and FreeBSD.
# But it also creates a bit more disk I/O which may just make it slower.
# Also note that if other software reads the mboxes/maildirs, they may handle
# the extra CRs wrong and cause problems.
#mail_save_crlf = no

##
## Maildir-specific settings
##

# By default LIST command returns all entries in maildir beginning with a dot.
# Enabling this option makes Dovecot return only entries which are directories.
# This is done by stat()ing each entry, so it causes more disk I/O.
# (For systems setting struct dirent->d_type, this check is free and it's
# done always regardless of this setting)
#maildir_stat_dirs = no

# When copying a message, do it with hard links whenever possible. This makes
# the performance much better, and it's unlikely to have any side effects.
#maildir_copy_with_hardlinks = yes

# When copying a message, try to preserve the base filename. Only if the
# destination mailbox already contains the same name (ie. the mail is being
# copied there twice), a new name is given. The destination filename check is
# done only by looking at dovecot-uidlist file, so if something outside
# Dovecot does similar filename preserving copies, you may run into problems.
# NOTE: This setting requires maildir_copy_with_hardlinks = yes to work.
#maildir_copy_preserve_filename = no

# Assume Dovecot is the only MUA accessing Maildir: Scan cur/ directory only
# when its mtime changes unexpectedly or when we can't find the mail otherwise.
#maildir_very_dirty_syncs = no

##
## mbox-specific settings
##

# Which locking methods to use for locking mbox. There are four available:
# dotlock: Create <mailbox>.lock file. This is the oldest and most NFS-safe
# solution. If you want to use /var/mail/ like directory, the users
# will need write access to that directory.
# dotlock_try: Same as dotlock, but if it fails because of permissions or
# because there isn't enough disk space, just skip it.
# fcntl : Use this if possible. Works with NFS too if lockd is used.
# flock : May not exist in all systems. Doesn't work with NFS.
# lockf : May not exist in all systems. Doesn't work with NFS.
#
# You can use multiple locking methods; if you do the order they're declared
# in is important to avoid deadlocks if other MTAs/MUAs are using multiple
# locking methods as well. Some operating systems don't allow using some of
# them simultaneously.
#
# The Debian value for mbox_write_locks differs from upstream Dovecot. It is
# changed to be compliant with Debian Policy (section 11.6) for NFS safety.
# Dovecot: mbox_write_locks = dotlock fcntl
# Debian: mbox_write_locks = fcntl dotlock
#
#mbox_read_locks = fcntl
#mbox_write_locks = fcntl dotlock

# Maximum time in seconds to wait for lock (all of them) before aborting.
#mbox_lock_timeout = 300

# If dotlock exists but the mailbox isn't modified in any way, override the
# lock file after this many seconds.
#mbox_dotlock_change_timeout = 120

# When mbox changes unexpectedly we have to fully read it to find out what
# changed. If the mbox is large this can take a long time. Since the change
# is usually just a newly appended mail, it'd be faster to simply read the
# new mails. If this setting is enabled, Dovecot does this but still safely
# fallbacks to re-reading the whole mbox file whenever something in mbox isn't
# how it's expected to be. The only real downside to this setting is that if
# some other MUA changes message flags, Dovecot doesn't notice it immediately.
# Note that a full sync is done with SELECT, EXAMINE, EXPUNGE and CHECK
# commands.
#mbox_dirty_syncs = yes

# Like mbox_dirty_syncs, but don't do full syncs even with SELECT, EXAMINE,
# EXPUNGE or CHECK commands. If this is set, mbox_dirty_syncs is ignored.
#mbox_very_dirty_syncs = no

# Delay writing mbox headers until doing a full write sync (EXPUNGE and CHECK
# commands and when closing the mailbox). This is especially useful for POP3
# where clients often delete all mails. The downside is that our changes
# aren't immediately visible to other MUAs.
#mbox_lazy_writes = yes

# If mbox size is smaller than this (in kilobytes), don't write index files.
# If an index file already exists it's still read, just not updated.
#mbox_min_index_size = 0

##
## dbox-specific settings
##

# Maximum dbox file size in kilobytes until it's rotated.
#dbox_rotate_size = 2048

# Minimum dbox file size in kilobytes before it's rotated
# (overrides dbox_rotate_days)
#dbox_rotate_min_size = 16

# Maximum dbox file age in days until it's rotated. Day always begins from
# midnight, so 1 = today, 2 = yesterday, etc. 0 = check disabled.
#dbox_rotate_days = 0

##
## IMAP specific settings
##

protocol imap {
# Login executable location.
#login_executable = /usr/lib/dovecot/imap-login

# IMAP executable location. Changing this allows you to execute other
# binaries before the imap process is executed.
#
# This would write rawlogs into user's ~/dovecot.rawlog/, if it exists:
# mail_executable = /usr/lib/dovecot/rawlog /usr/lib/dovecot/imap
# </usr/doc/dovecot-common/wiki/Debugging.Rawlog.txt>
#
# This would attach gdb into the imap process and write backtraces into
# /tmp/gdbhelper.* files:
# mail_executable = /usr/lib/dovecot/gdbhelper /usr/lib/dovecot/imap
#
#mail_executable = /usr/lib/dovecot/imap

# Maximum IMAP command line length in bytes. Some clients generate very long
# command lines with huge mailboxes, so you may need to raise this if you get
# "Too long argument" or "IMAP command line too large" errors often.
#imap_max_line_length = 65536

# Maximum number of IMAP connections allowed for a user from each IP address.
# NOTE: The username is compared case-sensitively.
#mail_max_userip_connections = 10

# Support for dynamically loadable plugins. mail_plugins is a space separated
# list of plugins to load.
#mail_plugins =
#mail_plugin_dir = /usr/lib/dovecot/modules/imap

# IMAP logout format string:
# %i - total number of bytes read from client
# %o - total number of bytes sent to client
#imap_logout_format = bytes=%i/%o

# Override the IMAP CAPABILITY response.
#imap_capability =

# How many seconds to wait between "OK Still here" notifications when
# client is IDLEing.
#imap_idle_notify_interval = 120

# ID field names and values to send to clients. Using * as the value makes
# Dovecot use the default value. The following fields have default values
# currently: name, version, os, os-version, support-url, support-email.
#imap_id_send =

# ID fields sent by client to log. * means everything.
#imap_id_log =

# Workarounds for various client bugs:
# delay-newmail:
# Send EXISTS/RECENT new mail notifications only when replying to NOOP
# and CHECK commands. Some clients ignore them otherwise, for example OSX
# Mail (<v2.1). Outlook Express breaks more badly though, without this it
# may show user "Message no longer in server" errors. Note that OE6 still
# breaks even with this workaround if synchronization is set to
# "Headers Only".
# netscape-eoh:
# Netscape 4.x breaks if message headers don't end with the empty "end of
# headers" line. Normally all messages have this, but setting this
# workaround makes sure that Netscape never breaks by adding the line if
# it doesn't exist. This is done only for FETCH BODY[HEADER.FIELDS..]
# commands. Note that RFC says this shouldn't be done.
# tb-extra-mailbox-sep:
# With mbox storage a mailbox can contain either mails or submailboxes,
# but not both. Thunderbird separates these two by forcing server to
# accept '/' suffix in mailbox names in subscriptions list.
# The list is space-separated.
#imap_client_workarounds =
}
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