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#### Authentication processes### 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.# See also ssl=required setting.disable_plaintext_auth = yes# Authentication cache size (e.g. 10M). 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 for cached data. After TTL expires 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 = 1 hour# TTL for negative hits (user not found, password mismatch).# 0 disables caching them completely.#auth_cache_negative_ttl = 1 hour# 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 = %Luauth_username_format = %u# 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# 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(). Use "$ALL" (with quotes) to allow all keytab# entries.#auth_gssapi_hostname =# Kerberos keytab to use for the GSSAPI mechanism. Will use the system# default (usually /etc/krb5.keytab) if not specified. You may need to change# the auth service to run as root to be able to read this file.#auth_krb5_keytab =# Do NTLM and GSS-SPNEGO authentication using Samba's winbind daemon and# ntlm_auth helper. <doc/wiki/Authentication/Mechanisms/Winbind.txt>#auth_use_winbind = no# Path for Samba's ntlm_auth helper binary.#auth_winbind_helper_path = /usr/bin/ntlm_auth# Time to delay before replying to failed authentications.#auth_failure_delay = 2 secs# Require a valid SSL client certificate or the authentication fails.#auth_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.#auth_ssl_username_from_cert = no# 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.auth_mechanisms = plain login#### Password and user databases#### 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>## User database specifies where mails are located and what user/group IDs# own them. For single-UID configuration use "static" userdb.## <doc/wiki/UserDatabase.txt>#!include auth-deny.conf.ext#!include auth-master.conf.ext!include auth-system.conf.ext!include auth-sql.conf.ext#!include auth-ldap.conf.ext#!include auth-passwdfile.conf.ext#!include auth-checkpassword.conf.ext#!include auth-vpopmail.conf.ext#!include auth-static.conf.ext