1. In your hard drive, find your Spam Assassin folder. Click the folder.
  2. Open the file named user_prefs with a text editor or Notepad. (If the file does not exist you can create it using the instructions on Spam Assassin’s website.)
  3. Make a new line with the text whitelist_from and the trusted address or domain you wish to add.
  4. Save the file and close it.