File extension MAILHOST (.MAILHOST) information

Windows cannot open MAILHOST files?

If Windows is unable to open file extension .MAILHOST you may have registry related errors or may not have the appropriate program installed. We strongly recommend that you run a free registry scan.

Appropriate program:

The .MAILHOST file extension identifies Microsoft e-mail preference files that come installed with MSN. You may have problems sending and receiving email if your .MAILHOST file is either missing or corrupted. In such circumstances you can restore this file by accessing the Run tool (found in the Start menu on windows), and then typing: regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair MAILHOST file extension association errors.


  • Performance: To optimize memory and CPU usage for MAILHOST files run a free performance scan.
  • Stability: Fix MAILHOST errors to make your system and applications more stable.
  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.

You are currently viewing the detail page for ABF file extension. This page contains a detailed description of the ABF file type, software tools to help resolve file association errors in the Windows registry together with relevant system utility applications and other related information.