GPO to append a email address to Outlook safe senders list for everyone

Chad Rodriguez 361 Reputation points
2022-08-17T15:15:10.347+00:00

Our AD environment is all 2012r2
Our OL environment is mostly all Version 2202 build 14931
I would like to know step by step best way to roll out a GPO to add an address to everyone's safe senders list and not remove what they currently have in place today.

Issue is that from a certain external email address a red X shows in body where we would have to right click and download picture, workaround is to add this external email address to safe senders for everyone. I worked with Microsoft to add this to the Security\Anti-spam\inbound policy safe senders list and while this works for OWA it doesn't for OL clients.

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Accepted answer
  1. Faery Fu-MSFT 16,836 Reputation points Microsoft Vendor
    2022-08-18T06:58:50.14+00:00

    Hi @Chad Rodriguez ,

    Here are the steps to publish a safe senders list through group policy.

    1. Add the safe sender list on Outlook client and export it to a .txt file and save the .txt file to a file share that is accessible by all clients.

    232248-export.png
    2) In the GPO go to User Configuration>Policies>Administrative Templates>Microsoft Office Outlook 2016> Options > Preferences > Junk Email > Specify path to Safe Senders list

    232284-1.png
    3) Set this policy to enabled and specify that path to the .txt file you saved in the step1.
    232285-2.png

    4) Go to Computer\HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\outlook\options\mail
    you need via the registry to tell Outlook to actually go import the file.
    Value Name: JunkMailImportLists
    Value Type: REG_DWORD
    Value Data:1
    Base: Decimal
    232286-reg.png

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  1. Chad Rodriguez 361 Reputation points
    2022-08-18T14:19:13.763+00:00

    I do not specifically see 'Microsoft Office Outlook 2016', can or should I be okay with using 'Microsoft Outlook 2016'?

    232457-2022-08-18-7-16-35.png

  2. Chad Rodriguez 361 Reputation points
    2022-08-18T14:31:13.437+00:00

    Additionally, from registry I'm assuming you want me to go to User Configuration\Preferences\Windows settings\Registry and create a new DWORD value?

    I do not see your path when I edit the GPO
    232524-gpo-regedit.png