All about AMSM Files

The AMSM file type is primarily associated with Atomic Mail Sender.

AMSMFile Extension AMSM
File extension: AMSM
File type:  Atomic Mail Sender files

What is an AMSM file

AMSM files mostly belong to Atomic Mail Sender by AtomPark Software Inc. AMSM files are project files used by Atomic Mail Sender for email campaigns. It includes email templates and the recipients list used in a given project for easier access to your marketing campaigns. With Atomic Mail Sender installed, opening AMSM files is done from the File / Open option in the Menu Bar. 

How to open an AMSM file

You need a suitable software like Atomic Mail Sender to open an AMSM file. You need a suitable software like Atomic Mail Sender from AtomPark Software Inc to open an AMSM 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 AMSM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a AMSM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online AMSM Text Viewer

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.AMSM File Not Opening? How to Fix It:

Because .AMSM files can come from different programs, they aren't universally openable.

  1. Identify the Source: These are often used by email marketers for desktop publishing, suggesting a project file from Atomic Mail Sender.
  2. Check the Header: Inspect the first bytes in a text editor or hex viewer:
    • Readable XML/JSON indicates a structured project file.
    • "PK" means it's a ZIP archive.
    • Unreadable binary suggests a proprietary format.
  3. Use the Original Software: The original program is usually required. Try AtomPark's Atomic Mail Sender, or ask the sender if uncertain.
  4. Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable metadata, and preview when possible.

Technical Data for AMSM File Extension

File classification:
Desktop Publishing
Related files:

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: AMSMessage, FileType: Atomic Mail Sender Message, AppName: Bulk email sender with built-in SMTP relay server
EXEFile: Tbm.exe


an amsm Atomic Mail Sender file is a special file format by AtomPark Software Inc and should only be edited and saved with the appropriate software.

How to solve problems with AMSM files

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