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收到以下错误消息。
“邮箱不可用。服务器响应为:5.7.1:客户端主机被拒绝:邮件被拒绝:收到无法投递的电子邮件。”
提交表单后,这发生在带有 IIS 6.0 的 Windows 2003 服务器上托管的 .net 网站上。