Attachment 182741 Details for Bug 254217 – my serveur setup

my serveur setup

dovecot.conf (text/plain), 44.33 KB, created by Nicolas Mailhot on 2007-08-31 06:19:33 UTC

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Creator: Nicolas Mailhot

Created: 2007-08-31 06:19:33 UTC

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patch

obsolete

>## 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.
>
># Base directory where to store runtime data.
>#base_dir = /var/run/dovecot/
>
># Protocols we want to be serving: imap imaps pop3 pop3s
># If you only want to use dovecot-auth, you can set this to "none".
>#protocols = imap imaps pop3 pop3s
>protocols = imaps
>
># 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, 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 { ... } section, so you can
># specify different ports for IMAP/POP3. For example:
>#   protocol imap {
>#     listen = *:10143
>#     ssl_listen = *:10943
>#     ..
>#   }
>#   protocol pop3 {
>#     listen = *:10100
>#     ..
>#   }
>#listen = [::]
>listen = 127.0.0.1
>
># 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 = no
>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 "
>
># 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 =
>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. Included doc/mkcert.sh can be used to easily generate self-signed
># certificate, just make sure to update the domains in dovecot-openssl.cnf
>#ssl_cert_file = /etc/pki/dovecot/certs/dovecot.pem
>#ssl_key_file = /etc/pki/dovecot/private/dovecot.pem
>ssl_cert_file = /etc/pki/dovecot/certs/dovecot.crt
>ssl_key_file = /etc/pki/dovecot/private/dovecot.key
>
># 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. Usually not needed.
># The CAfile should contain the CA-certificate(s) followed by the matching 
># CRL(s). CRL checking is new in dovecot .rc1
>#ssl_ca_file = 
>ssl_ca_file = /etc/pki/tls/certs/rousalka-ca.crt
>
># 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:!SSLv2
>
># 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 = 32
>
># 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
>
># 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 doc/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:%h/.maildir
>
># 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
>
>   # Show the mailboxes under this namespace with LIST command. This makes the
>   # namespace visible for clients that don't support NAMESPACE extension.
>   #list = yes
>#}
>
># 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. <doc/wiki/UserIds>
>#mail_uid =
>#mail_gid =
>
># Grant access to these extra groups for mail processes. Typical use would be
># to give "mail" group write access to /var/mail to be able to create dotlocks.
>#mail_extra_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 doc/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
>
># 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
>
># 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
>
># Disable mailbox list indexing.
>#mailbox_list_index_disable = no
>mailbox_list_index_disable = yes
>
># 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
>##
>
># 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 to wait between those checks. Dovecot is however able to use dnotify
># and inotify with Linux to reply immediately after the change occurs.
>#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
>
>##
>## 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.
>#mbox_read_locks = fcntl
>#mbox_write_locks = 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/libexec/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/libexec/dovecot/rawlog /usr/libexec/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/libexec/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 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/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
>
>  # 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 = 
>
>  # 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 = 
>}
>  
>##
>## POP3 specific settings
>##
>
>protocol pop3 {
>  # Login executable location.
>  #login_executable = /usr/libexec/dovecot/pop3-login
>
>  # POP3 executable location. See IMAP's mail_executable above for examples
>  # how this could be changed.
>  #mail_executable = /usr/libexec/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, along with the variable modifiers described in
>  # doc/wiki/Variables.txt (e.g. %Uf for the filename in uppercase)
>  #
>  #  %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             : %f or %v-%u (both might be used simultaneosly)
>  #  Cyrus (<= 2.1.3)    : %u
>  #  Cyrus (>= 2.1.4)    : %v.%u
>  #  Dovecot v0.99.x     : %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.
>  #
>  #pop3_uidl_format = %08Xu%08Xv
>
>  # POP3 logout format string:
>  #  %i - total number of bytes read from client
>  #  %o - total number of bytes sent to client
>  #  %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
>
>  # Maximum number of POP3 connections allowed for a user from each IP address.
>  # NOTE: The username is compared compared case-sensitively.
>  #mail_max_userip_connections = 3
>
>  # Support for dynamically loadable plugins. mail_plugins is a space separated
>  # list of plugins to load.
>  #mail_plugins = 
>  #mail_plugin_dir = /usr/lib/dovecot/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 = 
>}
>
>##
>## LDA specific settings
>##
>
>protocol lda {
>  # Address to use when sending rejection mails.
>  postmaster_address = postmaster@rousalka.dyndns.org
>
>  # Hostname to use in various parts of sent mails, eg. in Message-Id.
>  # Default is the system's real hostname.
>  hostname = rousalka.dyndns.org 
>
>  # Support for dynamically loadable plugins. mail_plugins is a space separated
>  # list of plugins to load.
>  #mail_plugins = 
>  #mail_plugin_dir = /usr/lib/dovecot/lda
>
>  # If user is over quota, return with temporary failure instead of
>  # bouncing the mail.
>  #quota_full_tempfail = no
>
>  # Binary to use for sending mails.
>  #sendmail_path = /usr/lib/sendmail
>
>  # Human readable error message for rejection mails. Use can use variables:
>  #  %n = CRLF, %r = reason, %s = subject, %t = recipient
>  #rejection_reason = Your message to <%t> was automatically rejected:%n%r
>
>  # UNIX socket path to master authentication server to find users.
>  #auth_socket_path = /var/run/dovecot/auth-master
>}
>
>##
>## Authentication processes
>##
>
># Executable location
>#auth_executable = /usr/libexec/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
># TTL for negative hits (user not found). 0 disables caching them completely.
>#auth_cache_negative_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
>
># Number of auth requests to handle before destroying the process. This may
># be useful if PAM plugins leak memory.
>#auth_worker_max_request_count = 0
>
># 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 = 
>
># Do NTLM authentication using Samba's winbind daemon and ntlm_auth helper.
># <doc/wiki/Authentication/Mechanisms/Winbind.txt>
>#auth_ntlm_use_winbind = no
>
># Path for Samba's ntlm_auth helper binary.
>#auth_winbind_helper_path = /usr/bin/ntlm_auth
>
>auth default {
>  # Space separated list of wanted authentication mechanisms:
>  #   plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey
>  #   gss-spnego
>  # NOTE: See also disable_plaintext_auth setting.
>  mechanisms = plain
>
>  #
>  # 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 {
>    # [session=yes] [setcred=yes] [failure_show_msg=yes]
>    # [cache_key=<key>] [<service name>]
>    #
>    # 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
>    # doc/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.
>    # 
>    # The service name can contain variables, for example %Ls expands to
>    # pop3 or imap.
>    #
>    # Some examples:
>    #   args = session=yes %Ls
>    #   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 {
>    # [scheme=<default password scheme>] <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, see doc/dovecot-sql-example.conf
>    #args = 
>  #}
>
>  # LDAP database <doc/wiki/AuthDatabase.LDAP.txt>
>  #passdb ldap {
>    # Path for LDAP configuration file, see doc/dovecot-ldap-example.conf
>    #args = 
>  #}
>
>  # vpopmail authentication <doc/wiki/AuthDatabase.VPopMail.txt>
>  #passdb vpopmail {
>    # [cache_key=<key>] - See cache_key in PAM for explanation.
>    # [quota_template=<template>] - %q expands to Maildir++ quota
>    #   (eg. quota_template=quota_rule=*:backend=%q)
>    #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 =
>  #}
>
>  # SQL database <doc/wiki/AuthDatabase.SQL.txt>
>  #userdb sql {
>    # Path for SQL configuration file, see doc/dovecot-sql-example.conf
>    #args = 
>  #}
>
>  # LDAP database <doc/wiki/AuthDatabase.LDAP.txt>
>  #userdb ldap {
>    # Path for LDAP configuration file, see doc/dovecot-ldap-example.conf
>    #args = 
>  #}
>
>  # 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 = 
>      #group = 
>    #}
>    #client {
>      # The client socket is generally safe to export to everyone. Typical use
>      # is to export it to your SMTP server so it can do SMTP AUTH lookups
>      # using it.
>      #path = /var/run/dovecot/auth-client
>      #mode = 0660
>    #}
>  #}
>}
>
># 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 limits are set using "quota_rule" parameters, either in here or in
>  # userdb. It's also possible to give mailbox-specific limits, for example:
>  #   quota_rule = *:storage=1048576
>  #   quota_rule2 = Trash:storage=102400
>  # User has now 1GB quota, but when saving to Trash mailbox the user gets
>  # additional 100MB.
>  #
>  # Multiple quota roots are also possible, for example:
>  #   quota = dict:user::proxy::quota
>  #   quota2 = dict:domain:%d:proxy::quota_domain
>  #   quota_rule = *:storage=102400
>  #   quota2_rule = *:storage=1048576
>  # Gives each user their own 100MB quota and one shared 1GB quota within
>  # the domain.
>  #
>  # You can execute a given command when user exceeds a specified quota limit.
>  # Each quota root has separate limits. Only the command for the first
>  # exceeded limit is excecuted, so put the highest limit first.
>  # Note that % needs to be escaped as %%, otherwise "% " expands to empty.
>  #   quota_warning = storage=95%% /usr/local/bin/quota-warning.sh 95
>  #   quota_warning2 = storage=80%% /usr/local/bin/quota-warning.sh 80
>  #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. cache_secs parameter
>  # specifies how many seconds to wait between stat()ing dovecot-acl file
>  # to see if it changed.
>  #acl = vfile:/etc/dovecot-acls:cache_secs=300
>
>  # 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
>  # Skip directories beginning with '.'
>  #convert_skip_dotdirs = no
>  # If source storage has mailbox names with destination storage's hierarchy
>  # separators, replace them with this character.
>  #convert_alt_hierarchy_char = _
>
>  # 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
>
>  # Expire plugin. Mails are expunged from mailboxes after being there the
>  # configurable time. The first expiration date for each mailbox is stored in
>  # a dictionary so it can be quickly determined which mailboxes contain
>  # expired mails. The actual expunging is done in a nightly cronjob, which
>  # you must set up:
>  #   dovecot --exec-mail ext /usr/libexec/dovecot/expire-tool
>  #expire = Trash 7 Spam 30
>  #expire_dict = db:/var/lib/dovecot/expire.db
>
>  # 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/
>
>  # Events to log. Default is all.
>  #mail_log_events = delete undelete expunge copy mailbox_delete
>  # Group events within a transaction to one line.
>  #mail_log_group_events = 
>  # Available fields: uid, box, msgid, size, vsize
>  # size and vsize are available only for expunge and copy events.
>  #mail_log_fields = uid box msgid size
>}

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Attachments on bug 254217: 182741