Distribution group moderator not receiving email for approval

[mhussainarif]

Hi Experts

I am using the Exchange 2016 CU 11 environment, I have a Distribution Group in Exchange Onprem and for message approval, we have a group moderator who has to approve the messages. When an email is sent to the Distribution Group, the moderator cannot receive the email to approve it. please suggest. 

[#2]

Did you check the message tracking logs?

[#3]

Hello @Vasil Michev, thanks for the reply. 
yes, I checked the message tracking as the given following, the email is directly sending to group members instead of sending it to the group moderator for approval. 

[#4]

I would suggest checking the properties of the DG or the mail flow rule used for moderation then.

[#5]

thanks for reply @Vasil Michev, I didn't create any transport rule for moderation, We're using the default DG option "Moderator" and it's already set. please suggest some other way.