Error 501

SafeSend Exchange Legacy version only. 

Please follow the below instructions to solve the error code 501.


  • Delete the folder in the following path:
  • C:/ProgramData/SafeSend-<version #>/FileUploader.
  • Delete the "FileUploader" folder.
    • Often times, the Program Data folder is hidden. To view this folder, go to the View tab in your file browser, then select the Hidden Items checkbox. 


  • Reinstall SafeSend. You may need to close Outlook and reopen for the changes to reflect.
  • If you need the download links and/or installation instructions for the plugin, please send an email request to
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