################################################################################
## DKIM - Domain Key Identified Mail
#

# DKIM-Signaturen verifizieren
$enable_dkim_verification = 1;

# DKIM-Signaturen erstellen
$enable_dkim_signing = 0;

# Private Keys und Selectors
#
# signing domain         selector   private key                       options
# -------------          --------   ----------------------            ----------
# dkim_key('nausch.org', '201411', '/var/spool/amavis/dkim/201411_nausch.org');

# Django : 2014-02-19
# DKIM-Keys für automatisch generierte Domainliste definieren
  open(filehandle,'/etc/postfix/all_local_domains_map')
    or die "Can't open domain-list-file: $!";
       while (<filehandle>)
             {
              chomp; s/\s*#.*$//; next if $_ eq '';
              dkim_key($_, '140224', '/var/spool/amavisd/dkim/dkim-key-141126.pem', h=>'sha256');
             }
  close(filehandle) or die "Can't close domain-list-file: $!";

# DKIM Signing Policies
@dkim_signature_options_bysender_maps = (
    { '.' =>
        {
                ttl => 21*24*3600,
                c => 'relaxed/simple'
        }
    }
);

...