Adding squeeze dovecot config

2 files changed, 1133 insertions, 0 deletions

diff --git a/templates/dovecot/dovecot.conf.erb b/templates/dovecot/dovecot.conf.lenny.erb
index 6d65f45..6d65f45 100644
--- a/templates/dovecot/dovecot.conf.erb
+++ b/templates/dovecot/dovecot.conf.lenny.erb
diff --git a/templates/dovecot/dovecot.conf.squeeze.erb b/templates/dovecot/dovecot.conf.squeeze.erb
new file mode 100644
index 0000000..3fc7698
--- /dev/null
+++ b/templates/dovecot/dovecot.conf.squeeze.erb
@@ -0,0 +1,1133 @@
+## 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
+# any of the lines. Exception to this are paths, they're 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
+
+# IP or host address where to listen in for connections. It's not currently
+# possible to specify multiple addresses. "*" listens in all IPv4 interfaces.
+# "[::]" listens in all IPv6 interfaces, but may also listen in all IPv4
+# interfaces depending on the operating system.
+#
+# 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. Defaults
+# to above if not specified.
+#ssl_listen =
+
+# Disable SSL/TLS support.
+#ssl_disable = no
+
+# 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
+ssl_cert_file = /etc/ssl/certs/cert.crt
+ssl_key_file = /etc/ssl/private/cert.pem
+
+# If key file is password protected, give the password here. Alternatively
+# give it when starting dovecot with -p parameter.
+#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
+
+# 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
+
+# Show protocol level SSL errors.
+#verbose_ssl = no
+
+##
+## Login processes
+##
+
+# <doc/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. <doc/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. <doc/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.
+# You should make sure that the process has at least
+# 16 + login_max_connections * 2 available file descriptors.
+#login_max_connections = 256
+
+# Greeting message for clients.
+#login_greeting = Dovecot ready.
+
+# 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
+
+# Dont log user IPs
+login_log_format_elements = user=<%%u> method=%m %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
+#
+# <doc/wiki/MailLocation.txt>
+#
+#mail_location = 
+mail_location = maildir:/var/mail/virtual/%u
+
+# If you need to set multiple mailbox locations or want to change default
+# namespace settings, you can do it by defining namespace sections.
+# NOTE: Namespaces currently work ONLY with IMAP! POP3 and LDA currently ignore
+# namespaces completely, they use only the mail_location setting.
+#
+# You can have private, shared and public namespaces. The only difference
+# between them is how Dovecot announces them to client via NAMESPACE
+# extension. Shared namespaces are meant for user-owned mailboxes which are
+# shared to other users, while public namespaces are for more globally
+# accessible mailboxes.
+#
+# 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 = yes
+
+   # If namespace is hidden, it's not advertised to clients via NAMESPACE
+   # extension or shown in LIST replies. This is mostly useful when converting
+   # from another server with different namespaces which you want to depricate
+   # but still keep working. For example you can create hidden namespaces with
+   # prefixes "~/mail/", "~%u/mail/" and "mail/".
+   #hidden = yes
+#}
+
+# 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
+
+# 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.
+#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
+
+# Don't write() to mmaped files. This is required for some operating systems
+# which use separate caches for them, such as OpenBSD.
+#mmap_no_write = no
+
+# Rely on O_EXCL to work when creating dotlock files. The default is to use
+# hard linking. O_EXCL makes the dotlocking faster, but it doesn't always
+# work with NFS.
+#dotlock_use_excl = no
+
+# 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
+
+# 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 = 1024
+
+# 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 or auth chroot variables.
+# 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. <doc/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. <doc/wiki/Chrooting.txt>
+#mail_chroot = 
+
+##
+## Mailbox handling optimizations
+##
+
+# Space-separated list of fields to initially save into cache file. Currently
+# these fields are allowed:
+#
+#  flags, date.sent, date.received, size.virtual, size.physical
+#  mime.parts, imap.body, imap.bodystructure
+#
+# Different IMAP clients work in different ways, so they benefit from
+# different cached fields. Some do not benefit from them at all. Caching more
+# than necessary generates useless disk I/O, so you don't want to do that
+# either.
+#
+# Dovecot attempts to automatically figure out what client wants and it keeps
+# only that. However the first few times a mailbox is opened, Dovecot hasn't
+# yet figured out what client needs, so it may not perform optimally. If you
+# know what fields the majority of your clients need, it may be useful to set
+# these fields by hand. If client doesn't actually use them, Dovecot will
+# eventually drop them.
+#
+# Usually you should just leave this field alone. The potential benefits are
+# typically unnoticeable.
+#mail_cache_fields = 
+
+# Space-separated list of fields that Dovecot should never save to cache file.
+# Useful if you want to save disk space at the cost of more I/O when the fields
+# needed.
+#mail_never_cache_fields = 
+
+# 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 = no
+
+# 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
+
+##
+## 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.
+#  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.
+#mbox_read_locks = fcntl
+#mbox_write_locks = dotlock fcntl
+
+# 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 ~/dovecot.rawlog/ directory:
+  #   mail_executable = /usr/lib/dovecot/rawlog /usr/lib/dovecot/imap
+  #
+  # This would attach gdb into the imap process and write backtraces into
+  # /tmp/gdbhelper.* files:
+  #   mail_executable = /usr/libexec/dovecot/gdbhelper /usr/libexec/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
+
+  # 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
+
+  # Send IMAP capabilities in greeting message. This makes it unnecessary for
+  # clients to request it with CAPABILITY command, so it saves one round-trip.
+  # Many clients however don't understand it and ask the CAPABILITY anyway.
+  #login_greeting_capability = no
+
+  # Override the IMAP CAPABILITY response.
+  #imap_capability = 
+
+  # 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".
+  #   outlook-idle:
+  #     Outlook and Outlook Express never abort IDLE command, so if no mail
+  #     arrives in half a hour, Dovecot closes the connection. This is still
+  #     fine, except Outlook doesn't connect back so you don't see if new mail
+  #     arrives.
+  #   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 = outlook-idle
+}
+  
+##
+## POP3 specific settings
+##
+
+protocol pop3 {
+  # Login executable location.
+  #login_executable = /usr/lib/dovecot/pop3-login
+
+  # POP3 executable location. See IMAP's mail_executable above for examples
+  # how this could be changed.
+  #mail_executable = /usr/lib/dovecot/pop3
+
+  # Don't try to set mails non-recent or seen with POP3 sessions. This is
+  # mostly intended to reduce disk I/O. With maildir it doesn't move files
+  # from new/ to cur/, with mbox it doesn't write Status-header.
+  #pop3_no_flag_updates = no
+
+  # Support LAST command which exists in old POP3 specs, but has been removed
+  # from new ones. Some clients still wish to use this though. Enabling this
+  # makes RSET command clear all \Seen flags from messages.
+  #pop3_enable_last = no
+
+  # If mail has X-UIDL header, use it as the mail's UIDL.
+  #pop3_reuse_xuidl = no
+
+  # Keep the mailbox locked for the entire POP3 session.
+  #pop3_lock_session = no
+
+  # POP3 UIDL (unique mail identifier) format to use. You can use following
+  # variables:
+  #
+  #  %v - Mailbox's IMAP UIDVALIDITY
+  #  %u - Mail's IMAP UID
+  #  %m - MD5 sum of the mailbox headers in hex (mbox only)
+  #  %f - filename (maildir only)
+  #
+  # If you want UIDL compatibility with other POP3 servers, use:
+  #  UW's ipop3d         : %08Xv%08Xu
+  #  Courier version 0   : %f
+  #  Courier version 1   : %u
+  #  Courier version 2   : %v-%u
+  #  Cyrus (<= 2.1.3)    : %u
+  #  Cyrus (>= 2.1.4)    : %v.%u
+  #  Older Dovecots      : %v.%u
+  #  tpop3d              : %Mf
+  #
+  # Note that Outlook 2003 seems to have problems with %v.%u format which was
+  # Dovecot's default, so if you're building a new server it would be a good
+  # idea to change this. %08Xu%08Xv should be pretty fail-safe.
+  #
+  # NOTE: Nowadays this is required to be set explicitly, since the old
+  # default was bad but it couldn't be changed without breaking existing
+  # installations. %08Xu%08Xv will be the new default, so use it for new
+  # installations.
+  #
+  pop3_uidl_format = %08Xu%08Xv
+
+  # POP3 logout format string:
+  #  %t - number of TOP commands
+  #  %p - number of bytes sent to client as a result of TOP command
+  #  %r - number of RETR commands
+  #  %b - number of bytes sent to client as a result of RETR command
+  #  %d - number of deleted messages
+  #  %m - number of messages (before deletion)
+  #  %s - mailbox size in bytes (before deletion)
+  #pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
+
+  # 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/pop3
+
+  # Workarounds for various client bugs:
+  #   outlook-no-nuls:
+  #     Outlook and Outlook Express hang if mails contain NUL characters.
+  #     This setting replaces them with 0x80 character.
+  #   oe-ns-eoh:
+  #     Outlook Express and Netscape Mail breaks if end of headers-line is
+  #     missing. This option simply sends it if it's missing.
+  # The list is space-separated.
+  #pop3_client_workarounds = 
+}
+
+##
+## MANAGESIEVE specific settings
+##
+
+protocol managesieve {
+  # Login executable location.
+  #login_executable = /usr/libexec/dovecot/managesieve-login
+
+  # MANAGESIEVE executable location. See IMAP's mail_executable above for 
+  # examples how this could be changed.
+  #mail_executable = /usr/libexec/dovecot/managesieve
+
+  # Maximum MANAGESIEVE command line length in bytes. This setting is 
+  # directly borrowed from IMAP. But, since long command lines are very
+  # unlikely with MANAGESIEVE, changing this will not be very useful.  
+  #managesieve_max_line_length = 65536
+
+  # If, for some inobvious reason, the sieve_storage remains unset, the 
+  # managesieve daemon uses the specification of the mail_location to find out 
+  # where to store the sieve files (see explaination in README.managesieve). 
+  # The example below, when uncommented, overrides any global mail_location 
+  # specification and stores all the scripts in '~/mail/sieve' if sieve_storage 
+  # is unset. However, you should always use the sieve_storage setting.
+  # mail_location = mbox:~/mail
+
+  # To fool managesieve clients that are focused on timesieved you can
+  # specify the IMPLEMENTATION capability that the dovecot reports to clients 
+  # (default: dovecot).
+  #managesieve_implementation_string = Cyrus timsieved v2.2.13
+}
+
+##
+## LDA specific settings
+##
+
+protocol lda {
+  # Address to use when sending rejection mails.
+  postmaster_address = postmaster@<%= fqdn %>
+
+  # Hostname to use in various parts of sent mails, eg. in Message-Id.
+  # Default is the system's real hostname.
+  #hostname = 
+
+  # 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/lda
+
+  # Binary to use for sending mails.
+  #sendmail_path = /usr/lib/sendmail
+
+  # UNIX socket path to master authentication server to find users.
+  auth_socket_path = /var/run/dovecot/auth-master
+
+  # Enabling Sieve plugin for server-side mail filtering
+  # mail_plugins = cmusieve
+  mail_plugins = sieve
+}
+
+##
+## Authentication processes
+##
+
+# Executable location
+#auth_executable = /usr/lib/dovecot/dovecot-auth
+
+# Set max. process size in megabytes.
+#auth_process_size = 256
+
+# Authentication cache size in kilobytes. 0 means it's disabled.
+# Note that bsdauth, PAM and vpopmail require cache_key to be set for caching
+# to be used.
+#auth_cache_size = 0
+# Time to live in seconds for cached data. After this many seconds the cached
+# record is no longer used, *except* if the main database lookup returns
+# internal failure. We also try to handle password changes automatically: If
+# user's previous authentication was successful, but this one wasn't, the
+# cache isn't used. For now this works only with plaintext authentication.
+#auth_cache_ttl = 3600
+
+# Space separated list of realms for SASL authentication mechanisms that need
+# them. You can leave it empty if you don't want to support multiple realms.
+# Many clients simply use the first one listed here, so keep the default realm
+# first.
+#auth_realms =
+
+# Default realm/domain to use if none was specified. This is used for both
+# SASL realms and appending @domain to username in plaintext logins.
+#auth_default_realm = 
+
+# List of allowed characters in username. If the user-given username contains
+# a character not listed in here, the login automatically fails. This is just
+# an extra check to make sure user can't exploit any potential quote escaping
+# vulnerabilities with SQL/LDAP databases. If you want to allow all characters,
+# set this value to empty.
+#auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@
+
+# Username character translations before it's looked up from databases. The
+# value contains series of from -> to characters. For example "#@/@" means
+# that '#' and '/' characters are translated to '@'.
+#auth_username_translation =
+
+# Username formatting before it's looked up from databases. You can use
+# the standard variables here, eg. %Lu would lowercase the username, %n would
+# drop away the domain if it was given, or "%n-AT-%d" would change the '@' into
+# "-AT-". This translation is done after auth_username_translation changes.
+#auth_username_format =
+
+# If you want to allow master users to log in by specifying the master
+# username within the normal username string (ie. not using SASL mechanism's
+# support for it), you can specify the separator character here. The format
+# is then <username><separator><master username>. UW-IMAP uses "*" as the
+# separator, so that could be a good choice.
+#auth_master_user_separator =
+
+# Username to use for users logging in with ANONYMOUS SASL mechanism
+#auth_anonymous_username = anonymous
+
+# More verbose logging. Useful for figuring out why authentication isn't
+# working.
+#auth_verbose = no
+
+# Even more verbose logging for debugging purposes. Shows for example SQL
+# queries.
+#auth_debug = no
+
+# In case of password mismatches, log the passwords and used scheme so the
+# problem can be debugged. Requires auth_debug=yes to be set.
+#auth_debug_passwords = no
+
+# Maximum number of dovecot-auth worker processes. They're used to execute
+# blocking passdb and userdb queries (eg. MySQL and PAM). They're
+# automatically created and destroyed as needed.
+#auth_worker_max_count = 30
+
+# Host name to use in GSSAPI principal names. The default is to use the
+# name returned by gethostname().
+#auth_gssapi_hostname =
+
+# Kerberos keytab to use for the GSSAPI mechanism. Will use the system 
+# default (usually /etc/krb5.keytab) if not specified.
+#auth_krb5_keytab = 
+
+auth default {
+  # Space separated list of wanted authentication mechanisms:
+  #   plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi
+  # NOTE: See also disable_plaintext_auth setting.
+  mechanisms = plain login
+
+  #
+  # Password database is used to verify user's password (and nothing more).
+  # You can have multiple passdbs and userdbs. This is useful if you want to
+  # allow both system users (/etc/passwd) and virtual users to login without
+  # duplicating the system users into virtual database.
+  #
+  # <doc/wiki/PasswordDatabase.txt>
+  #
+  # By adding master=yes setting inside a passdb you make the passdb a list
+  # of "master users", who can log in as anyone else. Unless you're using PAM,
+  # you probably still want the destination user to be looked up from passdb
+  # that it really exists. This can be done by adding pass=yes setting to the
+  # master passdb. <doc/wiki/Authentication.MasterUsers.txt>
+
+  # Users can be temporarily disabled by adding a passdb with deny=yes.
+  # If the user is found from that database, authentication will fail.
+  # The deny passdb should always be specified before others, so it gets
+  # checked first. Here's an example:
+
+  #passdb passwd-file {
+    # File contains a list of usernames, one per line
+    #args = /etc/dovecot.deny
+    #deny = yes
+  #}
+
+  # PAM authentication. Preferred nowadays by most systems. 
+  # Note that PAM can only be used to verify if user's password is correct,
+  # so it can't be used as userdb. If you don't want to use a separate user
+  # database (passwd usually), you can use static userdb.
+  # REMEMBER: You'll need /etc/pam.d/dovecot file created for PAM
+  # authentication to actually work. <doc/wiki/PasswordDatabase.PAM.txt>
+  #passdb pam {
+    # [blocking=yes] [session=yes] [setcred=yes]
+    # [cache_key=<key>] [<service name>]
+    #
+    # By default a new process is forked from dovecot-auth for each PAM lookup.
+    # Setting blocking=yes uses the alternative way: dovecot-auth worker
+    # processes do the PAM lookups.
+    #
+    # session=yes makes Dovecot open and immediately close PAM session. Some
+    # PAM plugins need this to work, such as pam_mkhomedir.
+    #
+    # setcred=yes makes Dovecot establish PAM credentials if some PAM plugins
+    # need that. They aren't ever deleted though, so this isn't enabled by
+    # default.
+    #
+    # cache_key can be used to enable authentication caching for PAM
+    # (auth_cache_size also needs to be set). It isn't enabled by default
+    # because PAM modules can do all kinds of checks besides checking password,
+    # such as checking IP address. Dovecot can't know about these checks
+    # without some help. cache_key is simply a list of variables (see
+    # /usr/share/doc/dovecot-common/wiki/Variables.txt) which must match for
+    # the cached data to be used. Here are some examples:
+    #   %u - Username must match. Probably sufficient for most uses.
+    #   %u%r - Username and remote IP address must match.
+    #   %u%s - Username and service (ie. IMAP, POP3) must match.
+    # 
+    # If service name is "*", it means the authenticating service name
+    # is used, eg. pop3 or imap (/etc/pam.d/pop3, /etc/pam.d/imap).
+    #
+    # Some examples:
+    #   args = session=yes *
+    #   args = cache_key=%u dovecot
+    #args = dovecot
+  #}
+
+  # System users (NSS, /etc/passwd, or similiar)
+  # In many systems nowadays this uses Name Service Switch, which is
+  # configured in /etc/nsswitch.conf. <doc/wiki/AuthDatabase.Passwd.txt>
+  #passdb passwd {
+    # [blocking=yes] - See userdb passwd for explanation
+    #args = 
+  #}
+
+  # Shadow passwords for system users (NSS, /etc/shadow or similiar).
+  # Deprecated by PAM nowadays.
+  # <doc/wiki/PasswordDatabase.Shadow.txt>
+  #passdb shadow {
+    # [blocking=yes] - See userdb passwd for explanation
+    #args = 
+  #}
+
+  # PAM-like authentication for OpenBSD.
+  # <doc/wiki/PasswordDatabase.BSDAuth.txt>
+  #passdb bsdauth {
+    # [cache_key=<key>] - See cache_key in PAM for explanation.
+    #args =
+  #}
+
+  # passwd-like file with specified location
+  # <doc/wiki/AuthDatabase.PasswdFile.txt>
+  #passdb passwd-file {
+    # Path for passwd-file
+    #args = 
+  #}
+
+  # checkpassword executable authentication
+  # NOTE: You will probably want to use "userdb prefetch" with this.
+  # <doc/wiki/PasswordDatabase.CheckPassword.txt>
+  #passdb checkpassword {
+    # Path for checkpassword binary
+    #args = 
+  #}
+
+  # SQL database <doc/wiki/AuthDatabase.SQL.txt>
+  passdb sql {
+    # Path for SQL configuration file
+    args = /etc/dovecot/dovecot-sql.conf
+  }
+
+  # LDAP database <doc/wiki/AuthDatabase.LDAP.txt>
+  #passdb ldap {
+    # Path for LDAP configuration file
+    #args = /etc/dovecot/dovecot-ldap.conf
+  #}
+
+  # vpopmail authentication <doc/wiki/AuthDatabase.VPopMail.txt>
+  #passdb vpopmail {
+    # [cache_key=<key>] - See cache_key in PAM for explanation.
+    #args =
+  #}
+
+  #
+  # User database specifies where mails are located and what user/group IDs
+  # own them. For single-UID configuration use "static".
+  #
+  # <doc/wiki/UserDatabase.txt>
+  #
+
+  # System users (NSS, /etc/passwd, or similiar). In many systems nowadays this
+  # uses Name Service Switch, which is configured in /etc/nsswitch.conf.
+  # <doc/wiki/AuthDatabase.Passwd.txt>
+  #userdb passwd {
+    # [blocking=yes] - By default the lookups are done in the main dovecot-auth
+    # process. This setting causes the lookups to be done in auth worker
+    # proceses. Useful with remote NSS lookups that may block.
+    # NOTE: Be sure to use this setting with nss_ldap or users might get
+    # logged in as each others!
+    #args = 
+  #}
+
+  # passwd-like file with specified location
+  # <doc/wiki/AuthDatabase.PasswdFile.txt>
+  #userdb passwd-file {
+    # Path for passwd-file
+    #args =
+  #}
+
+  # static settings generated from template <doc/wiki/UserDatabase.Static.txt>
+  userdb static {
+    # Template for the fields. Can return anything a userdb could normally
+    # return. For example:
+    #
+    #  args = uid=500 gid=500 home=/var/mail/%u
+    #
+    # If you use deliver, it needs to look up users only from the userdb. This
+    # of course doesn't work with static because there is no list of users.
+    # Normally static userdb handles this by doing a passdb lookup. This works
+    # with most passdbs, with PAM being the most notable exception. If you do
+    # the user verification another way, you can add allow_all_users=yes to
+    # the args in which case the passdb lookup is skipped.
+    #
+    #args =
+    args = uid=5000 gid=5000 home=/var/mail/virtual/%u allow_all_users=yes
+  }
+
+  # SQL database <doc/wiki/AuthDatabase.SQL.txt>
+  userdb sql {
+    # Path for SQL configuration file
+    args = /etc/dovecot/dovecot-sql.conf
+  }
+
+  # LDAP database <doc/wiki/AuthDatabase.LDAP.txt>
+  #userdb ldap {
+    # Path for LDAP configuration file
+    #args = /etc/dovecot/dovecot-ldap.conf
+  #}
+
+  # vpopmail <doc/wiki/AuthDatabase.VPopMail.txt>
+  #userdb vpopmail {
+  #}
+
+  # "prefetch" user database means that the passdb already provided the
+  # needed information and there's no need to do a separate userdb lookup.
+  # This can be made to work with SQL and LDAP databases, see their example
+  # configuration files for more information how to do it.
+  # <doc/wiki/UserDatabase.Prefetch.txt>
+  #userdb prefetch {
+  #}
+
+  # User to use for the process. This user needs access to only user and
+  # password databases, nothing else. Only shadow and pam authentication
+  # requires roots, so use something else if possible. Note that passwd
+  # authentication with BSDs internally accesses shadow files, which also
+  # requires roots. Note that this user is NOT used to access mails.
+  # That user is specified by userdb above.
+  user = root
+
+  # Directory where to chroot the process. Most authentication backends don't
+  # work if this is set, and there's no point chrooting if auth_user is root.
+  # Note that valid_chroot_dirs isn't needed to use this setting.
+  #chroot = 
+
+  # Number of authentication processes to create
+  #count = 1
+
+  # Require a valid SSL client certificate or the authentication fails.
+  #ssl_require_client_cert = no
+
+  # Take the username from client's SSL certificate, using 
+  # X509_NAME_get_text_by_NID() which returns the subject's DN's
+  # CommonName. 
+  #ssl_username_from_cert = no
+
+  # It's possible to export the authentication interface to other programs:
+  socket listen {
+    master {
+      # Master socket provides access to userdb information. It's typically
+      # used to give Dovecot's local delivery agent access to userdb so it
+      # can find mailbox locations.
+      path = /var/run/dovecot/auth-master
+      mode = 0600
+      # Default user/group is the one who started dovecot-auth (root)
+      user = vmail
+      group = mail
+    }
+
+    client {
+      # Assuming the default Postfix $queue_directory setting
+      path = /var/spool/postfix/private/auth
+      mode = 0660
+      # Assuming the default Postfix user and group
+      user = postfix
+      group = postfix
+    }
+  }
+}
+
+# If you wish to use another authentication server than dovecot-auth, you can
+# use connect sockets. They are assumed to be already running, Dovecot's master
+# process only tries to connect to them. They don't need any other settings
+# than the path for the master socket, as the configuration is done elsewhere.
+# Note that the client sockets must exist in the login_dir.
+#auth external {
+#  socket connect {
+#    master {
+#      path = /var/run/dovecot/auth-master
+#    }
+#  }
+#}
+
+##
+## Dictionary server settings
+##
+
+# Dictionary can be used by some plugins to store key=value lists.
+# Currently this is only used by dict quota backend. The dictionary can be
+# used either directly or though a dictionary server. The following dict block
+# maps dictionary names to URIs when the server is used. These can then be
+# referenced using URIs in format "proxy:<name>".
+
+dict {
+  #quota = mysql:/etc/dovecot-dict-quota.conf 
+}
+
+##
+## Plugin settings
+##
+
+plugin {
+  # Here you can give some extra environment variables to mail processes.
+  # This is mostly meant for passing parameters to plugins. %variable
+  # expansion is done for all values.
+
+  # Quota plugin. Multiple backends are supported:
+  #   dirsize: Find and sum all the files found from mail directory.
+  #            Extremely SLOW with Maildir. It'll eat your CPU and disk I/O.
+  #   dict: Keep quota stored in dictionary (eg. SQL)
+  #   maildir: Maildir++ quota
+  #   fs: Read-only support for filesystem quota
+  #quota = maildir
+
+  # ACL plugin. vfile backend reads ACLs from "dovecot-acl" file from maildir
+  # directory. You can also optionally give a global ACL directory path where
+  # ACLs are applied to all users' mailboxes. The global ACL directory contains
+  # one file for each mailbox, eg. INBOX or sub.mailbox.
+  #acl = vfile:/etc/dovecot-acls
+
+  # Convert plugin. If set, specifies the source storage path which is
+  # converted to destination storage (mail_location) when the user logs in.
+  # The existing mail directory is renamed to <dir>-converted.
+  #convert_mail = mbox:%h/mail
+  # Skip mailboxes which we can't open successfully instead of aborting.
+  #convert_skip_broken_mailboxes = no
+
+  # Trash plugin. When saving a message would make user go over quota, this
+  # plugin automatically deletes the oldest mails from configured mailboxes
+  # until the message can be saved within quota limits. The configuration file
+  # is a text file where each line is in format: <priority> <mailbox name>
+  # Mails are first deleted in lowest -> highest priority number order
+  #trash = /etc/dovecot-trash.conf
+
+  # Lazy expunge plugin. Currently works only with maildirs. When a user
+  # expunges mails, the mails are moved to a mailbox in another namespace
+  # (1st). When a mailbox is deleted, the mailbox is moved to another namespace
+  # (2nd) as well. Also if the deleted mailbox had any expunged messages,
+  # they're moved to a 3rd namespace. The mails won't be counted in quota,
+  # and they're not deleted automatically (use a cronjob or something).
+  #lazy_expunge = .EXPUNGED/ .DELETED/ .DELETED/.EXPUNGED/
+
+  # Specifies the location of the symlink pointing to the active script in
+  # the sieve storage directory. This must match the SIEVE setting used by
+  # deliver (refer to http://wiki.dovecot.org/LDA/Sieve#location for more
+  # info). Variable substitution with % is recognized.
+  sieve=~/.dovecot.sieve
+
+  # This specifies the path to the directory where the uploaded scripts must
+  # be stored. In terms of '%' variable substitution it is identical to
+  # dovecot's mail_location setting used by the mail protocol daemons.
+  sieve_storage=~/sieve
+}