How to suspend email for an entire domain

Introduction

This article provides the procedure to suspend email for a domain.

Procedure

1. Access the server's command line as the 'root' user via SSH or "Terminal" in WHM.
2. Run the following commands.

   touch /etc/blockeddomains

   echo "$domain.tld" >> /etc/blockeddomains

   Please note that "$domain.tld" must be replaced by the domain to block.
3. Log into WHM as the ‘root’ user.
4. Navigate to "Home / Service Configuration / Exim Configuration Editor."
5. Click the "Advanced Editor" tab.
6. Scroll down to the "Add additional configuration setting" button.
7. Click the "Add additional configuration setting" button.
8. Select "domainlist blocked_outgoing" from the newly created dropdown menu.
9. Enter the following in the textbox to the right of "domainlist blocked_outgoing."

   lsearch;/etc/blockeddomains

10. Scroll down to "custom_begin_outgoing_notsmtp_checkall" in "Section:ACLs."
11. Add the following to the "custom_begin_outgoing_notsmtp_checkall" textbox.

    discard
    sender_domains = +blocked_domains
    message = Message from $sender_address_domain is manually blacklisted.

12. Scroll to the bottom of the page.
13. Click the "Save" button.