What is SMTPListener.exe?

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 SMTPListener.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.

Click to Run a Free Scan for SMTPListener.exe related errors

SMTPListener.exe file information

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

The process known as SMTPListener.exe belongs to software Local SMTP Relay Server or 1st SMTP Server by F Key Solutions (

Description: SMTPListener.exe is not essential for Windows and will often cause problems. The SMTPListener.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 811,008 bytes (83% of all occurrences) or 1,332,760 bytes. 
There is no description of the program. The program is not visible. The SMTPListener.exe file is not a Windows core file. The application uses ports to connect to or from a LAN or the Internet. The software can be removed using the Control Panel's Add\Remove programs applet. It can change the behavior of other programs or manipulate other programs. SMTPListener.exe is able to connect to the Internet, monitor applications, record keyboard and mouse inputs and manipulate other programs. Therefore the technical security rating is 80% dangerous; however you should also read the user reviews.

Uninstalling this variant: The software vendor offers the option to do the following:
  1) uninstall Local SMTP Relay Server or Advanced SMTP Server software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7)
  2) look for help on the website.

Recommended: Identify SMTPListener.exe related errors

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

This belongs to SMTP Server Pro

Summary: Average user rating of SMTPListener.exe: based on 2 votes with 1 user comment. 2 users think it's neither essential nor dangerous.

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Best practices for resolving SMTPListener issues

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

SMTPListener.exe [all]