When I open Outlook, I don't see any entries in my safe sender list.
I read one of the other threads and disabled the Import Append setting and created a DWord value of 1 for JunkMailImportLists and JunkMailImportAppend in the following key:
HKEY_CURRENT_USER\Software\Policies\Microsoft\office\14.0\outlook\options\mail
At that location, I do see a JunkMailSafeSendersFile whose value is the path to the network share containing the file. The path does contain spaces so I enclosed the entire thing in quotes:
"\\emcc.edu\home\IT System Resources\Whitelist\whitelist.txt"
Not sure if the quotes were needed or not.
Despite numerous gpupdates and reboots, my safe send list remains vacant.
I can manually import the file in Outlook so I don't think it has anything to do with the file content or permissions.