A cnb file extension is related to the Pegasus Mail noticeboard mail stored message format.
There is one other file type using
the CNB file extension!
.cnb - Pool Of Radiance game data
Detailed description
Software that open cnb file
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CNB file extension - Pegasus Mail noticeboard mail stored message
What is cnb file? How to open cnb files?
The cnb file extension is associated with Pegasus Mail, an e-mail client for Microsoft Windows and other platforms, developed by David Harris.
The cnb file contains mail messages stored in noticeboards.
The default software associated to open cnb file:
Pegasus Mail 
Company or developer:
David Harris
Pegasus Mail is one of the Internet's longest-serving PC e-mail system used on Windows.
Help how to open:
Use Pegasus Mail to work with *.cnb files.
How to convert:
As far as we know, this .cnb file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .cnb file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cnb file, edit cnb file, convert cnb file, view cnb file, play cnb file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting cnb files.
Software that open cnb file - Pegasus Mail noticeboard mail stored message
Programs supporting the exension cnb on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Pegasus Mail for open cnb file action.
Programs that can create cnb file - Pegasus Mail noticeboard mail stored message
Programs supporting the exension cnb on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Pegasus Mail for create cnb file action.
Unspecified and all other actions for computer programs working with cnb file - Pegasus Mail noticeboard mail stored message
Click on the software link for more information about Pegasus Mail. Pegasus Mail uses cnb file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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