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S/MIME (Secure/Multipurpose Internet Mail Extensions) is a standard for public-key encryption and signing of MIME data. S/MIME is on an IETF standards track and defined in a number of documents, most importantly RFC 8551 .
Multipurpose Internet Mail Extensions (MIME) is a standard that extends the format of email messages to support text in character sets other than ASCII, as well as attachments of audio, video, images, and application programs. Message bodies may consist of multiple parts, and header information may be specified in non-ASCII character sets.
The only defined value, "nosniff", prevents Internet Explorer from MIME-sniffing a response away from the declared content-type. This also applies to Google Chrome, when downloading extensions. [71] X-Content-Type-Options: nosniff [72] X-Powered-By [stackoverflow1 1]
Some servers may require the manual addition of WOFF's MIME type to serve the files correctly. [33] Since February 2017, the proper MIME type is font/woff for WOFF 1.0 and font/woff2 for WOFF 2.0. [ 1 ] [ 2 ] Prior to February 2017, the standard MIME type for WOFF 1.0 was application/font-woff , and some applications may still use the old type ...
GUI (Chrome) Windows Live Mail: Microsoft Windows Proprietary: GUI Windows Mail (Vista) Microsoft Windows Proprietary: GUI YAM: YAM Open Source Team and contributing authors AmigaOS: GPL-2.0-or-later: GUI Zimbra Desktop: Zimbra: Cross-platform Mozilla Public License for server and ZPL for client GUI Client Author/Developer Operating system ...
- Your computer's file manager will open. Find and select the file or image you'd like to attach. Click Open. The file or image will be attached below the body of the email. If you'd like to insert an image directly into the body of an email, check out the steps in the "Insert images into an email" section of this article.
s/mime OpenPGP is a data encryption standard that allows end-users to encrypt the email contents. There are various software and email-client plugins that allow users to encrypt the message using the recipient's public key before sending it.
CMS is used as the key cryptographic component of many other cryptographic standards, such as S/MIME, PKCS #12 and the RFC 3161 digital timestamping protocol. OpenSSL is open source software that can encrypt, decrypt, sign and verify, compress and uncompress CMS documents, using the openssl-cms command.