Mac OS X Mail：什么是 winmail.dat 附件？
摘要
您可能想了解什么是 winmail.dat 附件——Mail 显示的带有“文本上的问号”图标的附件。
受影响的产品
Mail, Microsoft Outlook、Microsoft Exchange 客户端
该附件表示电子邮件通过 Microsoft 电子邮件应用程序发送（如 Outlook 和 Microsoft Exchange 客户端），并且包含富文本信息——字体、颜色和下划线或粗体等特殊属性应该如何在电子邮件中显示（附件不会显示在 Outlook 中，但会显示在 Mail 中；它可能作为名为 "application/ms-tnef" 的 MIME 部分显示在其他电子邮件应用程序中）。
避免这些附件
要避免将来看到这些附件，请发件人在发送邮件之前取消选择电子邮件中的“通过 Microsoft 富文本格式向此收件人发送”复选框或邮件客户端的偏好设置。
其他信息
有关更多信息，请参阅此 Microsoft 支持文稿。
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