The MMDF file extension is associated with the Multi-channel Memorandum Distribution Facility mailbox file format.

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Software that works with mmdf file extension

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MMDF file extension - Multi-channel Memorandum Distribution Facility mailbox format file

What is mmdf file? How to open mmdf files?

File type specification:

Email related data file type icon Email related data file type

The MMDF file extension is used for Multi-channel Memorandum Distribution Facility mailbox format.

The .mmdf files are used by some email programs for Ubuntu system.

An MMDF mailbox is a text file containing an arbitrary number of e-mail messages. Each message consists of a postmark, followed by an e-mail message formatted according to RFC822 / RFC2822, followed by a postmark. The file format is line-oriented. Lines are separated by line feed characters (ASCII 10). A postmark line consists of the four characters "^A^A^A^A" (Control-A; ASCII 1).

Help how to open MMDF files:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert file with extension MMDF:

As far as we know, this .mmdf 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 recommended software applications associated to the .mmdf file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux etc.) and possible program actions
that can be done with the file
: like open mmdf file, edit mmdf file, convert mmdf file, view mmdf file, play mmdf file etc. (if exist software for corresponding action in's database).

  • Others mmdf file

Unspecified and all other actions for computer programs working with mmdf file - Multi-channel Memorandum Distribution Facility mailbox format file

Click on the software link for more information about Ubuntu. Ubuntu uses mmdf 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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