File Type 1 Generic IconSynthetic Music Mobile Application File
File Format Proprietary (Yamaha)
Usage Referenced by an application; not meant to be opened manually; may run a program or script when opened
Popularity ★ ★ ★ ☆ ☆  Average

Yamaha SMAF sound file format created for mobile devices; commonly used for cell phone ring tones, but also supports the display of text and graphics; can be created from .WAV or .MID files using Yamaha SMAF Tools.

Addtional information about the SMAF format, as well as tools for creating and playing SMAF files, are available from Yamaha's SMAF Global website.

Open With

IconYamaha MidRadio Player


IconYamaha MidRadio Player

Updated 2007
File Type 2 Generic IconMicrosoft Message File
File Format Proprietary (Microsoft)
Usage Open manually
Popularity ★ ★ ☆ ☆ ☆  Uncommon

Microsoft mail message files are mail files used by Windows NT Mail; they contain mail messages that can be opened using the Windows NT Mail client.

MMF files cannot be imported directly into Outlook Express. However, they can be imported into the Microsoft Exchange client, which reformats the messages for the Exchange client. These messages can then be imported into Outlook Express.

Open With

IconMicrosoft NT Mail

IconMicrosoft Exchange Server

IconMicrosoft Outlook

Updated May 27, 2009
Information from the PC File Extensions Reference