Distribution group restriction is not working properly

Question

Hi Team,

I have setup a distribution list restriction with only a few people who can send messages to the distribution list. However, when I test with random employees, they do not get an error when entering the DL email in the 'To' address.

The message we used to get was "You don't have permission to send email to "Distribution List".

Please let me know how I can confirm the restriction is applied without having other to test by sending emails to the restriction DL.

Thanks
Thulasiraman N.

Answer 1

Hi,

Welcome to the Microsoft forum!

I tested the restriction ,and set that only “jake z” can send message to the distribution group, and then I send a message from “mikehu”,it didn’t alert "You don't have permission to send email to Distribution List” at first:

But after a while,I tried again,and finally it shows the alert like:

So I recommend you to use OWA to avoid outlook client or other reasons.

You can try to run the Command : Get-DistributionGroup -Identity testDL | Format-List (Replace “testDL” with the actual identity of your distribution group)

Check the following three attributes:

AcceptMessagesOnlyFromWithDisplayNames                

AcceptMessagesOnlyFromSendersOrMembersWithDisplayNames

AcceptMessagesOnlyFromDLMembersWithDisplayNames       

If the members of the list appear correctly in the results, the restriction has been successfully applied, but this may take some time to take effect, so please wait for a while.

Hope this helps.Please feel free to contact me if you need more support.