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What is the MlfHook.dll component needed for?

Simply stated, a DLL file is an unnamed executable file. It cannot be directly invoked, but it can be called by any executable Windows program.

The MlfHook.dll process is also known as Spam Filter Hook and is a part of ZoneAlarm Security Suite or, as the case may be, ZoneAlarm Extreme Security. This software is produced by SonicWALL (www.sonicwall.com). An obsolete or defective version of MlfHook.dll can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about MlfHook.dll Spam Filter Hook

MlfHook.dll is not part of Windows, but it is important nonetheless. The file MlfHook.dll is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 12,312 bytes (48% of all these files), 13,072 bytes, 12,048 bytes, 13,120 bytes or, as the case may be, 6,656 bytes.
This so-called dynamic link library (DLL) contains all the functions that have been transferred to a separate file. These transferred functions are available not only to this particular program, but can also be used by other applications. There is no embedded description in this file. These days, this is rather unusual This file also can also affect other applications by changing their properties. Such manipulation can cause an application to do things other than what it is intended to do. The program executes in the background, and can only be terminated using Windows Task Manager. For this service - unlike Windows' own system services - there is no good description available. The MlfHook file is no part of Microsoft Windows. The original file is digitally signed. Check your file. The producer of the file is registered with a certificate authority. This confirms the genuineness of the file. MlfHook.dll is capable of interpret keystrokes. MlfHook.dll appears to be a file that was compressed by an EXE-Packer. This technique is often used by trojans to keep the file size small and also hamper debugging efforts. However, this in itself is not sufficient reason to presume malicious intent, since even well-intentioned, professional software producers take advantage of compressed files. For this reason, 53% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves MlfHook.dll. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about MlfHook?

Part of the ZoneAlarm SPAM mail filter (further information...)
John New York
Part of the new spam filter in ZoneAlarm Security Suite 7. Safe
Pat EM
MailFrontier Desktop is an anti-spam and anti-phishing solution that filters and blocks unwanted spammed email messages. (further information...)
This is a component of MailFrontier Desktop. MailFrontier Desktop is an anti-spam and anti-phishing solution that filters and blocks unwanted spammed email messages. The program recognizes messages from the friend's list and messages from spammers through the automatic set-up. Messages missed by the program's filter can also be manually added to a block list. (further information...)
not dangerous (further information...)

Summary: 11 users judge MlfHook.dll to be an essential file that should not be touched. One user considers it harmless. source: file.net

How to uninstall ZoneAlarm Security Suite or ZoneAlarm Extreme Security

MlfHook.dll Spam Filter Hook fix

To remove Spam Filter Hook from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for ZoneAlarm Security Suite or ZoneAlarm Extreme Security in the list of available programs.
  5. Click Uninstall.

How to tell if MlfHook.dll (Spam Filter Hook) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of Spam Filter Hook. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Spam Filter Hook or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or MlfHook.dll is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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