Restricted Distribution Group should be able to recieve emails from external senders.

Hello All,

Scenario : Set all Distribution group RequireAllSenderstobeAuthenticated : $True.

Now the DL will reject emails from external senders. But we want some specific external senders to be able to send emails to the DLs.

We created a mail contact with the external email address and sent an email to the restricted DL, it still gives the delivery failure saying that the senders are to be authenticated.

Please let me know if there's a way to suffice the requirement.