如下500错误是何意？该如何解决？

jhonlone

There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.

            <abc.com.cn #5.5.0 smtp;500 Non RFC-compliant response received>

[ 本帖最后由 jhonlone 于 2007-8-7 15:41 编辑 ]

jhonlone

今天又忽然遇到那个讨厌的 551 User not local; please try <forward-path>错误了，检查跟踪日志，消息明明已经发出去了，晕菜啊？