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Basic information about SNM file

When there is a problem with opening files with the file extension SNM（*.SNM or *.snm）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the SNM file yourself.

There are 1 file types using the SNM file extension in our database. In the further part of this page, you will find detail information about all the SNM file with their brief description and a list of programs that support SNM file sorted by operating systems. The table below provides useful information about the SNM file extension. It answers questions such as:
  • What is the SNM file?
  • How to open a SNM file?
  • What programs do I need to open a SNM file?
  • What programs help to create and edit a SNM file?
  • How to convert SNM files to another file format?
  • How to convert another files to SNM file format?


1.Detail information about SNM file extension: Netscape Mail Index

File type Netscape Mail Index Category Misc Files
Developer Netscape Communications File format N/A
Description SNM file is a Netscape Mail Index developed by Netscape Communications. Index of messages stored in a Netscape Messenger or Collabra mailbox, which are older email programs not commonly used anymore.
Software programs that will open, edit or convert SNM files

Windows		 Netscape Messenger
Netscape Collabra
MailNavigator Mailbox Reader
Netscape Mail

macOS		 Netscape Messenger
Netscape Collabra



Can't open a SNM file?

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

”Can't open this file: example.SNM”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the SNM extension without any issue.


Where I can download the application that support SNM file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of SNM files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a SNM file?

The reasons for the lack of the ability to open a SNM file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a SNM file. If there is still something wrong, you might want to check:

  • Whether the SNM file is damaged.
  • Whether the SNM file is incorrectly linked in the registry entries.
  • Whether the SNM file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the SNM file format is incompletely.
  • Whether the SNM file is infected.
  • Whether the drivers of the equipment used for opening a SNM file are up to date.
  • Whether your computer has enough hardware resources to open a SNM file.

If the SNM file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.