Hi,@Adele Vance
Thanks for posting your question in the Microsoft Q&A forum.
Based on your description, you can disable DNR for DL:
Set-DistributionGroup -Identity "Group Name" -ReportToOriginatorEnabled $false
The ReportToManagerEnabled parameter specifies whether delivery status notifications (also known as DSNs, non-delivery reports, NDRs, or bounce messages) are sent to the owners of the group (defined by the ManagedBy property). Valid values are:
- $true: Delivery status notifications are sent to the owners of the group.
- $false: Delivery status notifications aren't sent to the owners of the group. This is the default value.
The ReportToManagerEnabled and ReportToOriginatorEnabled parameters affect the return path for messages sent to the group. Some email servers reject messages that don't have a return path. Therefore, you should set one parameter to $false and one to $true, but not both to $false or both to $true.
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