问题：450 sorry,your envelope sender is rejected temporarily
各位老师：我使用的postfix系统，发给教育部的邮件全部出现以下提示：2490C188810B 766786 Mon Aug 20 23:00:18 [email]xxxxx@neusoft.edu.cn[/email]
(host mail.moe.edu.cn[202.205.177.26] said: 450 sorry,your envelope sender is rejected temporarily. Please see help on [url]http://support.eqmail.com.[/url] (#4.5.0) (in reply to DATA command))
[email]XXXXXXX@moe.edu.cn[/email]
不知道什么原因，请求各位老师帮助！
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