amavis-new错误一直在队列中不能发出

jimstone

错误信息如下，请各位帮忙
Oct  2 09:46:45 mail postfix/smtp[7384]: 9EF1B5C0152: to=<root@test.com>, orig_to=<root>, relay=127.0.0.1[127.0.0.1]:10024, delay=280001, delays=280001/0.13/0.01/0.05, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 Error in processing, id=07366-01, parts_decode_ext FAILED: Unix utility file(1) not available, but is needed at (eval 50) line 109. (in reply to end of DATA command))

谢谢了