What is MailWasher.exe?

The genuine MailWasher.exe file is a software component of MailWasher Pro by Firetrust.
An email previewer, MailWasher allows you to view your email messages before downloading them locally. It also has the ability to filter spam and undesired messages. MailWasher has the ability to either start with Windows, or start with your preferred email client. MailWasher was created and distributed by FiretrusT, a small New Zealand software company.

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the MailWasher.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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MailWasher.exe file information

Windows Task Manager with MailWasher
MailWasher.exe process in Windows Task Manager

The process known as MailWasher (version 6.5.0, 6.5.4) belongs to software MailWasher Pro (version 6.1 Fr) by Firetrust (

Description: MailWasher.exe is not essential for the Windows OS and causes relatively few problems. MailWasher.exe is located in a subfolder of "C:\Program Files". The file size on Windows 10/8/7/XP is 13,179,660 bytes. 
There is an icon for this program on the taskbar next to the clock. The file is not a Windows system file. The file is digitally signed. Therefore the technical security rating is 28% dangerous, however you should also read the user reviews.

Uninstalling this variant: You have the option to do the following:
  1) uninstall the software MailWasher Pro or MailWasher Pro 6.1 Fr using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)
  2) ask for help from Support
  3) check if there is a newer version available.

Recommended: Identify MailWasher.exe related errors

Important: Some malware camouflages itself as MailWasher.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the MailWasher.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

It is not "eCosm" company the developer. It is "FireTrusT" now
  Antonio Perez   (further information)
Mail screening well
  Longfellow   (further information)
Checks for mail and gives you the opportunity review your messages before you download thenm to your PC.
  Steve Morris   (further information)
Programm läuft ständig im Hintergrund, um Spam-Emails zu filtern.
Scans 95% of spam out of our email (700 up to 800 each day) before getting to the inbox. Software from
  Bert   (further information)

Summary: Average user rating of MailWasher.exe: based on 5 votes with 5 user comments. 5 users think MailWasher.exe is essential for Windows or an installed application.

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Best practices for resolving MailWasher issues

A clean and tidy computer is the key requirement for avoiding problems with MailWasher. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the MailWasher.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

MailWasher.exe [all]