Opening a CNM File

The CNM file type is primarily associated with Mercury Mail Transport System.

CNM	File extension: CNM
	File type:	data file

What is a CNM file?

CNM files mostly belong to Mercury Mail Transport System. Your CNM file may be one of two specific types.

Email Message File: In most cases, a CNM file holds an email message used by the Mercury Mail Transport System from Mercury/32. These files store message data including sender, recipient, subject, and body. For more details, visit Mercury Mail Transport System.

NoteMap Outline File: In other cases, a CNM file contains an outline for concept mapping. This type is used by concept mapping software to organize ideas and structure information. More information is available at Concept Mapping Software.

FilExt.com note: Use the software that originally created the file to view it correctly. This helps ensure all formatting and embedded data remain intact.

How do you open CNM files?

You need a suitable software like Mercury Mail Transport System to open a CNM file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CNM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CNM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CNM Text Viewer

Choose your .cnm file to view

or drag and drop it here

Online File Viewer

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How to extract texts from CNM files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

You can extract texts from CNM file or capture a preview screenshot using our online CNM file viewer:

To do so, click the "Choose your .cnm file to view" button above.
Your CNM file will then be displayed in the browser.
Now click on "Save as..." at the top of the page.
Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
Your file will be converted and downloaded.

Programs that open and convert CNM files:

Mercury Mail Transport System
See the previous paragraphs to learn more about the main application. CNM files are often referred to as Mercury Mail Transport System data files because this type of file is primarily created or used by this software.
NoteMap (Outline File) by LexisNexis
NoteMap is a tool that creates outlines. CaseSoft, Ltd was acquired by LexisNexis 24 July 2006.
Pegasus Mail (New Mail Message) by David Harris
The actual name generally begins with a Y to indicate a normally delivered new mail message (local or by Mercury), or P to indicate a POP3-delivered message.
Windows Application Menu Options and Setup File
WinRoute (Electronic Mail File) by Kerio Technologies Inc.
It's possible to open these files using Outlook Express. This is done by associating the extension with the application "C:\Program Files\Outlook Express\msimn.exe" /eml:%1 The Mime types used with this association are: message/rfc822.

CNM file extension format:

Why is it important to know the file format? This is the only way to find out which program to use to open the file. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. Knowledge is power - this also applies when dealing with unknown or faulty files. Our evaluation of the CNM files looks like this:

The CNM file extension is not common and is used by a few programs, each with its own file format. The following file formats are most commonly found in CNM files:

60% of all CNM files have the same signature Re. These files are text files and can therefore be read using a text editor. A typical file size is 5 KB. The file type was used 20 years ago but is still in use today. The following keywords are characteristic: Received: from, Return-path, Mercury, X-Envelope-To, spooler and with. These files are attributed to email.
15% of all CNM files start with the bytes TPF0 crucial for this file format. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. CNM files are between 17 KB and 130 KB in size. The keywords CurBuildNum, CurVersionMajNum, CurVersionMinNum, CurVersionString, OrigBuildNum, OrigVersionMajNum, OrigVersionMinNum, OrigVersionString, TPF0, TVersionInfo, NoteM and NoteMap Version 2.1.21 CaseSoft are typical for these files. Files like these have the following tags: outline, and often consist of personal data.

All other CNM files (25%) have different formats, often e.g. CNM video. Drag & drop your file here to see the file format and a preview of your CNM file!

Technical Data for CNM File Extension

File classification:

Data

Related files:

msg, eml, mbox, pst, nmo, out, chm, xm2, cm3, ct5, txt, xml

Mime type:

application/octet-stream

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: CNMFile
EXEFile: %ProgramFiles%\CaseSoft\NoteMap\NoteMap.exe

a cnm data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with CNM files

Associate the CNM file extension with the correct application.
Update your software that should actually open data files. Because only the current version supports the latest CNM file format. Search, therefore, e.g. on the manufacturer website after an available Mercury Mail Transport System update.
To make sure that your CNM file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .CNM file online - secure, fast, and no downloads needed.