$enable_dkim_verification = 1;  # enable DKIM signatures verification
$enable_dkim_signing = 0;    # load DKIM signing code, keys defined by dkim_key
dkim_key('nausch.org', 'main', '/var/amavis/dkim/dkim-key.pem'); # Nausch.org's Mailserver key
@dkim_signature_options_bysender_maps = (
    { '.' => { ttl => 21*24*3600, c => 'relaxed/simple' } } );