File Extension MMF

  • Full name
    Microsoft Mail Message Format
  • Developer
  • Popularity
Have you encountered a problem with a MMF file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a MMF file here. In the further part of this page we have added a list of programs that should open your MMF file. It is enough you choose a proper application for your operating system, download and install it.

Programs which can open a MMF file

How to open file with MMF extension?

In order to open a file with MMF extension one of the following programs must be installed on user’s system. If a problem with opening MMF file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with MMF files, follow the instructions below.
Install Microsoft Mail or other program from the list

Most often resolving problems with opening MMF files is very simple. Just install an appropriate program that supports such files. All of the listed programs support MMF files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of MMF files or offer file conversion options, but may not be capable of editing such files.

Set Microsoft Mail as the default program for opening MMF files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate MMF files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Microsoft Mail applications is not on the list, select "Browse" option in order to manually locate the directory where Microsoft Mail has been installed.


Check the section that lists most common problems with MMF files

Sometimes problems with opening MMF files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • MMF files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open MMF files (should that be the case, please contact your system administrator or IT specialist)
  • MMF file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)

Similar extensions