docker-mx-server/dovecot/config/dovecot-dict-auth.conf.ext

# This file is commonly accessed via passdb {} or userdb {} section in
# conf.d/auth-dict.conf.ext

# Dictionary URI
#uri = 

# Default password scheme
default_pass_scheme = MD5

# Username iteration prefix. Keys under this are assumed to contain usernames.
iterate_prefix = userdb/

# Should iteration be disabled for this userdb? If this userdb acts only as a
# cache there's no reason to try to iterate the (partial & duplicate) users.
#iterate_disable = no

# The example here shows how to do multiple dict lookups and merge the replies.
# The "passdb" and "userdb" keys are JSON objects containing key/value pairs,
# for example: { "uid": 1000, "gid": 1000, "home": "/home/user" }

key passdb {
  key = passdb/%u
  format = json
}
key userdb {
  key = userdb/%u
  format = json
}
key quota {
  key = userdb/%u/quota
  #format = value
  # The default_value is used if the key isn't found. If default_value setting
  # isn't specified at all (even as empty), the passdb/userdb lookup fails with
  # "user doesn't exist".
  default_value = 100M
}

# Space separated list of keys whose values contain key/value paired objects.
# All the key/value pairs inside the object are added as passdb fields.
passdb_objects = passdb

#passdb_fields {
#}

# Userdb key/value object list.
userdb_objects = userdb

userdb_fields {
  # dict:<key> refers to key names
  quota_rule = *:storage=%{dict:quota}

  # dict:<key>.<objkey> refers to the objkey inside (JSON) object
  mail = maildir:%{dict:userdb.home}/Maildir
}