CF File Extension

What is CF file?

CF filename suffix is mostly used for Sendmail Configuration Format files. Files with CF extension may be used by programs distributed for Linux, Mac OS, Windows platform. Files with CF extension are categorized as Settings Files files. The Settings Files subset comprises 1305 various file formats. The most popular program for handling CF files is Text editor, but users can choose among 3 different programs that support this file format.

Programs which support CF file extension

The following list contains programs grouped by 3 operating systems that support CF files. Files with CF suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

How to open file with CF extension?

There can be multiple causes why you have problems with opening CF files on given system. Fortunately, most common problems with CF files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. We have prepared a listing of which will help you resolve your problems with CF files.

Step 1. Get the Text editor

The most common reason for such problems is the lack of proper applications that supports CF files installed on the system. The most obvious solution is to download and install Text editor or one to the listed programs: Sendmail, Unix. 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 Text editor installed is by going to developer’s website () and downloading the software using provided links.

Step 2. Update Text editor to the latest version

You still cannot access CF files although Text editor is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. This can be one of the causes why CF files are not compatible with Text editor. The most recent version of Text editor is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate Sendmail Configuration Format files with Text editor

After installing Text editor (the most recent version) make sure that it is set as the default application to open CF files. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Change the default application in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the CF file
• Click Choose another app and then select More apps option
• To finalize the process, select Look for another app on this PC entry and using the file explorer select the Text editor installation folder. Confirm by checking Always use this app to open CF files box and clicking OK button.

Change the default application in Mac OS

• From the drop-down menu, accessed by clicking the file with CF extension, select Information
• Open the Open with section by clicking its name
• Select the appropriate software and save your settings by clicking Change all
• A message window should appear informing that This change will be applied to all files with CF extension. By clicking Continue you confirm your selection.

Step 4. Ensure that the CF file is complete and free of errors

Should the problem still occur after following steps 1-3, check if the CF file is valid. It is probable that the file is corrupted and thus cannot be accessed.

1. Check the CF file for viruses or malware

Should it happed that the CF is infected with a virus, this may be that cause that prevents you from accessing it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. CF file is infected with malware? Follow the steps suggested by your antivirus software.

2. Check whether the file is corrupted or damaged

If the CF file was sent to you by someone else, ask this person to resend the file to you. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. If the CF file has been downloaded from the internet only partially, try to redownload it.

3. Ensure that you have appropriate access rights

Sometimes in order to access files user need to have administrative privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the Sendmail Configuration Format file.

4. Check whether your system can handle Text editor

If the system is under havy load, it may not be able to handle the program that you use to open files with CF extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Sendmail Configuration Format file. It may be the case that the CF files work properly with updated software that addresses some system bugs.

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