File Extension Library

.MAILHOST File Extension

  • Developer by: Microsoft
  • Category: Settings Files

What are .MAILHOST files and how to open them?

Can't open .MAILHOST file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .MAILHOST file.

What is a .MAILHOST file extension?

.MAILHOST file extension is created by Microsoft. .MAILHOST has been classified as Settings Files.

.MAILHOST is MSN Mailhost Settings File

Stores preferences for the e-mail server used by MSN; installed with MSN software and required for MSN to check and send e-mail; typically named "MSN#.mailhost."

If the Mailhost file is corrupt or missing, the MSN software may display a "Mailhost File" error. To recover the Mailhost file, first select "Run..." from the Windows Start menu. Then type the following in the text box:

regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll

This should restore the Mailhost file and allow MSN to communicate with the mail server again.

Also see the related .DOWNLOADHOST entry.

How to fix problems with .MAILHOST files

  1. You need to update the application that you normally use to open .MAILHOST files. Only the latest version of the software supports the current .MAILHOST file format
  2. You need to check the .MAILHOST file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)