Here is my /etc/dovecot.conf:
Thanks Again!!!
## Dovecot configuration file
# If you're in a hurry, see http://wiki.dovecot.org/QuickConfiguration
# '#' 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 after each value, 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 #protocols = imap imaps pop3 pop3s
# 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 { ... } section, so you can # specify different ports for IMAP/POP3. For example: # protocol imap { # listen = *:10143 # ssl_listen = *:10943 # .. # } # protocol pop3 { # listen = *:10100 # .. # } #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 = no
# 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 ##
# Use this logfile instead of syslog(). /dev/stderr can be used if you want to # use stderr for logging (ONLY /dev/stderr - otherwise it is closed). #log_path = log_path = /var/log/dovecot10
# For informational messages, use this logfile instead of the default #info_log_path = info_log_path = /var/log/dovecot10-info
# 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 =
# 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/postfix/newcert.pem ssl_key_file = /etc/postfix/newreq. 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. Usually not needed. #ssl_ca_file =
# Request client to send a certificate. #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 ##
# 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. # http://wiki.dovecot.org/Rootless #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. # http://wiki.dovecot.org/UserIds #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 create. If login_process_per_connection is # yes, this is the number of extra processes waiting for users to log in. login_processes_count = 3
# Maximum number of extra login processes to create. The extra 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 limit set by this # setting is reached. This setting is used only if # login_process_per_connection is yes. login_max_processes_count = 128
# Maximum number of connections allowed in login state. When this limit is # reached, the oldest connections are dropped. If login_process_per_connection # is no, this is a per-process value, so the absolute maximum number of users # logging in actually login_processes_count * max_logging_users. login_max_logging_users = 256
# Greeting message for clients. login_greeting = LXDNET IMAP 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 ##
# Default MAIL environment to use when it's not set. By leaving this empty # dovecot tries to do some automatic detection as described in # doc/mail-storages.txt. 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/variables.txt for full list. Some examples: # # default_mail_env = maildir:/var/mail/%1u/%u/Maildir # default_mail_env = mbox:~/mail/:INBOX=/var/mail/%u # default_mail_env = mbox:/var/mail/%d/%n/:INDEX=/var/indexes/%d/%n # #default_mail_env =
# If you need to set multiple mailbox locations or want to change default # namespace settings, you can do it by defining namespace sections: # # You can have private, shared and public namespaces. 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. default_mail_env 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. #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 # default_mail_env, 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 #}
# 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 mail_debug = yes
# Log prefix for mail processes. See doc/variables.txt for list of possible # variables you can use. #mail_log_prefix = "%Us(%u): "
# Use mmap() instead of read() to read mail files. read() seems to be a bit # faster with my Linux/x86 and it's better with NFS, so that's the default. # Note that OpenBSD 3.3 and older don't work right with mail_read_mmaped = yes. #mail_read_mmaped = no
# Don't use mmap() at all. This is required if you store indexes to shared # filesystems (NFS or clustered filesystem). #mmap_disable = no mmap_disable = yes
# 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
# 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. NOTE: If you use NFS, remember to change also mmap_disable setting! #lock_method = fcntl #lock_method = dotlock
# 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
# Default umask to use for mail files and directories. #umask = 0077
# ':' 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. See doc/configuration.txt for more information. #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. #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 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 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
# Copy mail to another folders using hard links. This is much faster than # actually copying the file. This is problematic only if something modifies # the mail in one folder but doesn't want it modified in the others. I don't # know any MUA which would modify mail files directly. IMAP protocol also # requires that the mails don't change, so it would be problematic in any case. # If you care about performance, enable it. #maildir_copy_with_hardlinks = 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 = 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
# 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
# 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. 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 delay-newmail }
## ## POP3 specific settings ##
protocol pop3 { # Login executable location. #login_executable = /usr/libexec/dovecot/pop3-login
# POP3 executable location #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 format to use. You can use following variables: # # %v - Mailbox UIDVALIDITY # %u - Mail 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/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@example.com
# 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/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 }
## ## 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. Also note that currently auth cache doesn't work very well if # you're using multiple passdbs with same usernames in them. #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. #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
# 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 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. # # http://wiki.dovecot.org/Authentication # # 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. # # http://wiki.dovecot.org/MasterPassword
# 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. passdb pam { # [session=yes] [setcred=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/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 }
# /etc/passwd or similar, using getpwnam() # In many systems nowadays this uses Name Service Switch, which is # configured in /etc/nsswitch.conf. #passdb passwd { #}
# /etc/shadow or similiar, using getspnam(). Deprecated by PAM nowadays. #passdb shadow { #}
# BSD authentication. Used by at least OpenBSD. #passdb bsdauth { # [cache_key=<key>] - See cache_key in PAM for explanation. #args = #}
# passwd-like file with specified location #passdb passwd-file { # Path for passwd-file #args = #}
# checkpassword executable authentication # NOTE: You will probably want to use "userdb prefetch" with this. #passdb checkpassword { # Path for checkpassword binary #args = #}
# SQL database #passdb sql { # Path for SQL configuration file, see doc/dovecot-sql.conf for example #args = #}
# LDAP database #passdb ldap { # Path for LDAP configuration file, see doc/dovecot-ldap.conf for example #args = #}
# vpopmail authentication #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". # # http://wiki.dovecot.org/Authentication # http://wiki.dovecot.org/VirtualUsers #
# /etc/passwd or similar, using getpwnam() # In many systems nowadays this uses Name Service Switch, which is # configured in /etc/nsswitch.conf. userdb passwd { }
# passwd-like file with specified location #userdb passwd-file { # Path for passwd-file #args = #}
# static settings generated from template #userdb static { # Template for settings. Can return anything a userdb could normally # return, eg.: uid, gid, home, mail, nice # # A few examples: # # args = uid=500 gid=500 home=/var/mail/%u # args = uid=500 gid=500 home=/home/%u mail=mbox:/home/%u/mail nice=10 # #args = #}
# SQL database #userdb sql { # Path for SQL configuration file, see doc/dovecot-sql.conf for example #args = #}
# LDAP database #userdb ldap { # Path for LDAP configuration file, see doc/dovecot-ldap.conf for example #args = #}
# vpopmail #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. # http://wiki.dovecot.org/AuthSpecials #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_oneline() # which typically uses subject's Distinguished Name. #ssl_username_from_cert = no
# It's possible to export the authentication interface to other programs: #socket listen { #master { # Master socket is typically used to give Dovecot's local delivery # agent access to userdb so it can find mailbox locations. It can # however also be used to disturb regular user authentications. # WARNING: Giving untrusted users access to master socket may be a # security risk, don't give too wide permissions to it! #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 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 # 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 (default_mail_env). #convert_mail = mbox:%h/mail
# 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 }