SMIME file format description

Many people share .smime files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .smime file can be edited, converted or printed with. On this page, we try to provide assistance for handling .smime files.

1 filename extension(s) found in our database.

.smime - OpenSSL S/MIME Format Message

The SMIME data files are related to OpenSSL. SMIME file is an OpenSSL S/MIME Format Message. S/MIME (Secure Multipurpose Internet Mail Extensions) is a standard for public key encryption and signing of MIME data.

Application:

OpenSSL

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

OpenSSL S/MIME Format Message related extensions:

.ca: OpenSSL Certificate Authority Data
.crt: Certificate File
.csr: Certificate Signing Request
.der: Certificate File
.kdb: Key Database File
.orq: OCSP Request Data

Naturally, other applications may also use the .smime file extension. Even harmful programs can create .smime files. Be especially cautious with .smime files coming from an unknown source!

Can't open a .smime file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:

example.smime

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .smime file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

mime

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.mime: MIME Encoded Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

https://datatypes.net/open-smime-files

If you have useful information about the .smime file format, then write to us!

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