PM1 File Extension

What is PM1 file?

Full format name of files that use PM1 extension is Pegasus Mail Secondary Address Book Index. Pegasus Mail Secondary Address Book Index format was developed by David Harris. PM1 files are supported by software applications available for devices running Windows. PM1 file belongs to the Web Files category just like 303 other filename extensions listed in our database. Pegasus Mail is by far the most used program for working with PM1 files. Pegasus Mail software was developed by David Harris, and on its official website you may find more information about PM1 files or the Pegasus Mail software program.

Programs which support PM1 file extension

The following listing features PM1-compatible programs. Files with PM1 extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

How to open file with PM1 extension?

Being unable to open files with PM1 extension can be have various origins. What is important, all common issues related to files with PM1 extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Install Pegasus Mail software

The main and most frequent cause precluding users form opening PM1 files is that no program that can handle PM1 files is installed on user’s system. To address this issue, go to the Pegasus Mail developer website, download the tool, and install it. It is that easy On the top of the page a list that contains all programs grouped based on operating systems supported can be found. The safest method of downloading Pegasus Mail installed is by going to developer’s website (David Harris) and downloading the software using provided links.

Step 2. Verify the you have the latest version of Pegasus Mail

If you already have Pegasus Mail installed on your systems and PM1 files are still not opened properly, check if you have the latest version of the software. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. If you have an older version of Pegasus Mail installed, it may not support PM1 format. The most recent version of Pegasus Mail is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate Pegasus Mail Secondary Address Book Index files with Pegasus Mail

If the issue has not been solved in the previous step, you should associate PM1 files with latest version of Pegasus Mail you have installed on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

Change the default application in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the PM1 file
• Select Choose another app → More apps
• The last step is to select Look for another app on this PC option supply the directory path to the folder where Pegasus Mail is installed. Now all that is left is to confirm your choice by selecting Always use this app to open PM1 files and clicking OK.

Change the default application in Mac OS

• From the drop-down menu, accessed by clicking the file with PM1 extension, select Information
• Proceed to the Open with section. If its closed, click the title to access available options
• Select Pegasus Mail and click Change for all...
• Finally, a This change will be applied to all files with PM1 extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Verify that the PM1 is not faulty

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the PM1 file in question. Problems with opening the file may arise due to various reasons.

1. Verify that the PM1 in question is not infected with a computer virus

If the file is infected, the malware that resides in the PM1 file hinders attempts to open it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. PM1 file is infected with malware? Follow the steps suggested by your antivirus software.

2. Ensure the file with PM1 extension is complete and error-free

Did you receive the PM1 file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with PM1 extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Verify whether your account has administrative rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Verify that your device fulfills the requirements to be able to open Pegasus Mail

If the systems has insufficient resources to open PM1 files, try closing all currently running applications and try again.

5. Verify that your operating system and drivers are up to date

Latest versions of programs and drivers may help you solve problems with Pegasus Mail Secondary Address Book Index files and ensure security of your device and operating system. It is possible that one of the available system or driver updates may solve the problems with PM1 files affecting older versions of given software.

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