What is MDSpamD.exe?

The genuine MDSpamD.exe file is a software component of MDaemon Messaging Server by Alt-N Technologies.
MDSpamD.exe is an executable file that belongs to MDaemon Server, an email server software designed for the Windows platform. This file is not a critical Windows file though removal may cause problems when running the Altiris Agent. The MDaemon Messaging Server features support for IMAP, SMTP, and POP3 mail protocols. The program supports multiple languages, mail archiving, mobile device management, remote administration, and security features and more. The program is designed for small- to medium-sized businesses as it does not require high administrative costs and provides a low per-user cost. Alt-N Technologies is an American company that develops email messaging and collaboration products used by SMBs (small-to-medium businesses). The company was founded in 1996 by Arvel Hathcock and is currently based in Grapevine, Texas, USA.

MDSpamD stands for MDaemon AntiSpam Directory

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 MDSpamD.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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MDSpamD.exe file information

The process belongs to software MDaemon Server by Alt-N Technologies (

Description: MDSpamD.exe is not essential for the Windows OS and causes relatively few problems. The file MDSpamD.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 3,092,546 bytes (33% of all occurrences), 3,477,570 bytes or 5,140,546 bytes. 
The software has no file description. The program is not visible. The application listens for or sends data on open ports to a LAN or the Internet. The file is not a Windows core file. You can uninstall this program in the Control Panel. Therefore the technical security rating is 63% dangerous.

Uninstalling this variant: There is a possibility to completely remove MDaemon Server (Control Panel ⇒ Uninstall a Program).

Recommended: Identify MDSpamD.exe related errors

Important: Some malware camouflages itself as MDSpamD.exe. Therefore, you should check the MDSpamD.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.


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Best practices for resolving MDSpamD issues

A clean and tidy computer is the key requirement for avoiding problems with MDSpamD. 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 MDSpamD.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

MDSpamD.exe [all]