Dovecot 2.4

## Dovecot configuration file
# Dovecot configuration version. This must be the first setting in the
# configuration file. It specifies the configuration syntax, the used setting
# names and the expected default values.
dovecot_config_version = 2.4.2

# Dovecot storage file format version. It specifies the oldest Dovecot version
# that must be able to read files written by this Dovecot instance. The
# intention is that when upgrading Dovecot cluster, this setting is first kept
# as the old Dovecot version. Once the cluster is fully upgraded to a new
# version and there is no intention to rollback to the old version anymore,
# this version number can be increased.
dovecot_storage_version = 2.4.2

# The configuration below is a minimal configuration file using system user  authentication.
# See https://doc.dovecot.org/latest/core/config/quick.html

!include_try conf.d/*.conf

protocols {
 imap = yes
 pop3 = yes
 sieve = yes
 lmtp = yes
}

mail_plugins {
  acl = yes
}

mailbox_list_layout = fs
mail_home = /var/mail/%{user|domain}/%{user|username}@%{user|domain}
mail_driver = maildir
mail_path = ~

mail_uid = mail
mail_gid = mail

first_valid_uid = 8
last_valid_uid = 8

auth_verbose = yes
auth_debug_passwords = yes
log_debug = category=auth
log_debug = category=ssl
log_debug = category=mail

ssl = yes
ssl_min_protocol = LATEST
ssl_server_cert_file = /etc/letsencrypt/live/example.com/fullchain.pem
ssl_server_key_file = /etc/letsencrypt/live/example.com/privkey.pem
ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA

auth_allow_cleartext = no
auth_default_domain = example.com
auth_mechanisms = PLAIN LOGIN
auth_master_user_separator = *

acl_driver = vfile
acl_sharing_map {
 dict file {
 path = /var/lib/dovecot/db/shared-mailboxes.db
 }
}

sieve_script default {
 type = default
 name = default
 driver = file
 path = /etc/dovecot/sieve/default.sieve
}

sql_driver = mysql

mysql localhost {
 user = user
 password = password
 dbname = postfix
}

passdb_default_password_scheme = SHA256-CRYPT

passdb sql {
 query = SELECT username as user, '%{user|domain}' as domain, password, '/var/mail/%{user|domain}/%{user|username}@%{user|domain}' as userdb_home, 'maildir:/var/mail/%{user|domain}/%{user|username}@%{user|domain}' as userdb_mail, 8 as userdb_uid, 12 as userdb_gid FROM mailbox WHERE username = '%{user}' AND domain = '%{user|domain}' AND active = '1'
}

userdb sql {
 query = SELECT '/var/mail/%{user|domain}/%{user|username}@%{user|domain}' as home, 'maildir:/var/mail/%{user|domain}/%{user|username}@%{user|domain}' as mail, 8 AS uid, 12 AS gid, concat('dirsize:storage=',  quota) AS quota FROM mailbox WHERE username = '%{user}' AND domain = '%{user|domain}' AND active = '1'
}

protocol lda {
 mail_plugins {
 sieve = yes
 }
 auth_socket_path = /var/run/dovecot/auth-master
 deliver_log_format = mail from %f: msgid=%m %$
 lda_mailbox_autocreate = yes
 lda_mailbox_autosubscribe = yes
}

protocol lmtp {
 mail_plugins {
 quota = yes
 sieve = yes
 }
 postmaster_address = support
 lmtp_save_to_detail_mailbox = yes
 recipient_delimiter = +
}

protocol imap {
 mail_plugins {
 imap_acl = yes
 }
 imap_client_workarounds = tb-extra-mailbox-sep
 mail_max_userip_connections = 10
}

protocol pop3 {
 pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
 pop3_uidl_format = %{uid | hex(8)}%{uidvalidity | hex(8)}
 mail_max_userip_connections = 10
}

service auth {
 unix_listener /var/spool/postfix/private/dovecot-auth {
 group = postfix
 mode = 0660
 user = postfix
 }
unix_listener auth-master {
 user = mail
 group = mail
 mode = 0666
 }
unix_listener auth-userdb {
 user = mail
 group = mail
 mode = 0660
 }
}

service lmtp {
 unix_listener /var/spool/postfix/private/dovecot-lmtp {
 user = postfix
 group = postfix
 mode = 0600
 }
}

namespace inbox {
 type = private
 separator = /
 prefix =
 inbox = yes

 mailbox Sent {
 auto = subscribe
 special_use = \Sent
 }
 mailbox "Sent Messages" {
 auto = no
 special_use = \Sent
 }
 mailbox "Sent Items" {
 auto = no
 special_use = \Sent
 }
 mailbox Drafts {
 auto = subscribe
 special_use = \Drafts
 }
 mailbox Trash {
 auto = subscribe
 special_use = \Trash
 }
 mailbox "Deleted Messages" {
 auto = no
 special_use = \Trash
 }
 mailbox Junk {
 auto = subscribe
 special_use = \Junk
 }
 mailbox Spam {
 auto = no
 special_use = \Junk
 }
 mailbox "Junk E-mail" {
 auto = no
 special_use = \Junk
 }
 mailbox Archive {
 auto = no
 special_use = \Archive
 }
 mailbox Archives {
 auto = no
 special_use = \Archive
 }
}

namespace shared {
 type = shared
 separator = /
 prefix = Shared/$user/
 list = children
 subscriptions = yes
 mail_driver = maildir
 mailbox_list_layout = fs
 mail_path = %{owner_home}
 mail_index_path = ~/Shared/%{owner_user}
}