create transport rule

Roger Roger 5,046 Reputation points
2024-05-26T15:27:46.71+00:00

I am using an Exchange hybrid environment. I have a DL(mydl) in Exchange on-premises. I want to create the following transport rule. I can create this in Exchange Online, but I cannot create it in Exchange on-premises as I don't see all the options. I am using Exchange 2016. The DL is on-premises and all my users are online. Will just creating the transport rule online work?

Additionally, I need to know if there's an option to reject emails triggered in Bcc to the DL.

Name:Test1

Apply this rule if: The message: The To or Cc box contains 'mydl@mydomain.com'

Do the following:
Block the message: Reject the message with the explaination 'DL is restricted'

Except if: the sender: 
The senders domain is '1.com' or '1.org'

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  1. Bruce Jing-MSFT 1,610 Reputation points Microsoft Vendor
    2024-05-27T09:13:53.03+00:00

    Hi,@Roger Roger

    Thanks for posting your question in the Microsoft Q&A forum.

    Based on your description, I will answer in order.

    1. Transfer rules created in Online are available to be applied on-premises Exchange.

    2.Because the Bcc (Bcc) message really doesn't show up in the header of the message, creating a mail rule doesn't really reject Bcc messages.

    Considering that all your users are on Online, you might consider creating DLs in the Exchange Online.

    Because we can use Set-DistributionGroup -Identity "your DG name" -BccBlocked $true to block cc copied emails to the DL.

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    If my answer is helpful to you, please mark it as the answer so that other users can refer to it. Thank you for your support and understanding.

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