GNU Mailutils

ldap {
  # Enable LDAP lookups.
  enable bool;
  # Set URL of the LDAP server.
  url url;
  # Base DN for LDAP lookups.
  base string;
  # DN for accessing LDAP database.
  binddn string;
  # Password for use with binddn.
  passwd string;
  # Use TLS encryption.
  tls bool;
  # Set LDAP debugging level.
  debug number;
  # Set a field-map for parsing LDAP replies.
  field-map map;
  # LDAP filter to use for getpwnam requests.
  getpwnam string;
  # LDAP filter to use for getpwuid requests.
  getpwuid filter;
}