In this post, we will learn the steps to configure Message Delivery Restrictions for a Mailbox in Exchange 2019.

We can use the Exchange Admin Center (EAC) web interface or the Exchange Management Shell (EMS) to place restrictions on whether messages are delivered to individual recipients. Message delivery restrictions are useful to control who can send messages to users in your organization.

We can also configure message delivery restrictions for distribution groups and shared mailboxes using the same steps.

Configure Message Delivery Restrictions for a Mailbox:

On Exchange 2019 Mailbox Server.

1. Open Internet Explorer and type https://localhost/ecp, and then press Enter. Sign in as an Administrator with the password.

1. open exchange admin center

2. In the Exchange Admin Center web interface, navigate to Recipients. Click on mailboxes tab.

1. click on mailboxes tab

3. On the Mailbox tab, select the mailbox for which you want to configure message delivery restrictions and then click Edit.

2. select the mailbox and click on edit

4. On the mailbox properties page, click Mailbox features.

3. click on mailbox features tab

5. Under Message Delivery Restrictions, select View details to view or change the setting for Message Delivery Restrictions.

4. click on details under message delivery restriction

6. We can configure a mailbox to accept or reject messages sent by specific users or to accept messages only from users in your Exchange organization.

5. verify the existing settings

In this example, we will only configure reject messages from the setting.

7. Under Rejects messages from, select Senders in the following list radio button.

6. select reject message from

8. Click on + (plus) sign to add the mailbox.

7. click on plus sing to add

9. Select the Mailbox and click on the add button.

8. select the mailbox or group

10. Click on OK to save the changes.

9. click on OK

11. Click on Save to save the changes.

10. click on save

Verify Message Delivery Restrictions settings for Mailbox:

12. Login to outlook on the web using a user account.

11. Access user mailbox using owa

13. Try to compose a new email to the email address for which we have configured message delivery restrictions.

12. Mailtip will gives the error

14. As we can see the MailTips warns us that the user does not have the permission to send a message to the mailbox.

13. try to send message

15. Even if we send a message to that mailbox, the user will receive the NDR (Non-Delivery Report).

That’s all. In this article, we have learned the steps to configure message delivery restrictions for a Mailbox in Exchange Server 2019.

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