如何用DC�??述MARC丰富的题�??类型

一�?�?�行问了一个有关采用DC�??述MARC丰富的题�??信�?�的问题，Email答�?�?��?�到退信，而且是Permanent Failure：

Delivery to the following recipient failed permanently:
******@163.com
Technical details of permanent failure:
PERM_FAILURE: SMTP Error (state 8): 559 CoremailSys:Error: too many letters during this connection

正好这个问题�?常被问�?�，带有一点普�??性。现将我的解答贴出�?�（�?去无关的个人信�?�），供大家�?�考。