.P7M 文件扩展名
S/MIME Email Message
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什么是 P7M 文件？
A P7M file is an S/MIME encrypted or signed email message. Most commonly, P7M files appear in web-based email clients, when they attempt to show an S/MIME encrypted message. Instead of showing the encrypted message, these programs show an empty message with a P7M attachment.
更多信息
Secure/Multipurpose Internet Mail Extensions (S/MIME) is an email encryption and digital signature standard. It is used to encrypt sensitive messages and verify senders' identities. For example, businesses might use S/MIME encryption to protect confidential medical or financial information sent via email.
To use S/MIME, you must install an S/MIME certificate and link it with your email client, such as Microsoft Outlook or Apple Mail. If your email client is not linked to a valid S/MIME certificate, messages encrypted or signed using S/MIME will contain a P7M file. Most often, this file is named smime.p7m.
常见 .P7M 文件名
smime.p7m - The default name for P7M files that arrive as email attachments. They usually contain encrypted email content.
如何打开 P7M 文件
You can open P7M files in Cryptigo p7mViewer (Windows). If your P7M file contains an email that was only signed using S/MIME, you can open the file without a private key. If your P7M file contains an email encrypted using S/MIME, you need the private key used to encrypt the file.