What file extensions should be blocked?

What file extensions should be blocked?

There are file types recommended to be blocked at the email gateway and are known to be a source of infection/malicious code. It is recommended to block executable file types since infection risk is high….Archive or Compressed File Types:

  • ARJ.
  • LZH.
  • R01.
  • R14.
  • R18.
  • R25.
  • TAR.
  • ACE.

How do I add an extension to a file?

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  1. Open the file in its default program.
  2. Click the File menu.
  3. Click Save As.
  4. Select a saving location.
  5. Name the file.
  6. Click the “Save as Type” menu.
  7. Select a different extension.
  8. Click Save As.

How do I enable file names extensions?

Open File Explorer (open any folder). Click the View tab. Select “File name extensions.” Optionally, you can enable Hidden items….Windows 7:

  1. In the Start menu search, type folder options.
  2. In the Folder Options window, click the View tab.
  3. Remove the check from “Hide extensions for known file types.”
  4. Click OK.

How do I unblock a file extension?


  1. Select File > Options.
  2. In the Options window, select Trust Center > Trust Center Settings.
  3. In the Trust Center window, select File Block Settings, and then clear the “Open” or “Save” check box for the file type that you want to open or save.
  4. Select OK two times.

What file types does Outlook block?

Blocked file types in Outlook

File name extension File type
.pst MS Exchange Address Book File, Outlook Personal Folder File (Microsoft)
.reg Registration Information/Key for W95/98, Registry Data File
.scf Windows Explorer Command
.scr Windows Screen Saver

How do I add an extension to all files in a folder?

You can do this by going to My Computer and then going to Tools and Folder Options.

  1. In Windows 7, click on the Organize button and then click Folder and search options.
  2. In Windows 8, you just click on the View tab in Explorer and check the File name extensions box.

How do I enable file extensions in Windows 11?

Head to the search option, type in ‘file explorer option,’ and select the Best match. Now choose the View tab. Under the Advanced settings option, go to Files and Folders section and uncheck the Hide extensions for known file types options.

How do I show hidden extensions?

Windows 10:

  1. Open File Explorer; if you do not have an icon for this in the task bar; click Start, click Windows System, and then File Explorer.
  2. Click the View tab in File Explorer.
  3. Click the box next to File name extensions to see file extensions.
  4. Click the box next to Hidden items to see hidden files.

How do I enable file block settings?

To enable this file type, do the following:

  1. Click the File tab.
  2. Under Help, click Options.
  3. Click Trust Center, and then click Trust Center Settings.
  4. In the Trust Center, click File Block Settings.