机要邮资机符志的启用党政机关和单位寄送的保密文件、物品称为机要邮件。已往,机要邮件一般都以贴用邮票或盖印邮资已付日戳缴纳邮资。2003年3月,国家邮政局通知,决定从4月1日起全国停止使用邮资已付日戳,大宗邮件(包括机要邮件)以联网管理的邮资机取而代之。遵照这一通知,从4 The confidential documents that the confidential documents of confidential postal machines and confidential documents sent by the Party and government organs and units are called confidential postal mail. In the past, confidential mails have generally been postage prepaid or stamped postage paid postage. In March 2003, the State Post Bureau informed that it decided to stop using postage-paid datestamps nationwide from April 1, and bulk mail (including confidential mail) was replaced by networked postage machines. Follow this notice, from 4