How to suspend email for an entire domain

Question

How can I suspend email for an entire domain?

Answer

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

   Note: 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, and click it.
7. Select "domainlist blocked_outgoing" from the newly created dropdown menu.

8. Enter the following in the textbox to the right of "domainlist blocked_outgoing."

   CONFIG_TEXT: lsearch;/etc/blockeddomains

9. Scroll down to "custom_begin_outgoing_notsmtp_checkall" in Section:ACLs

10. Add the following to the "custom_begin_outgoing_notsmtp_checkall" textbox:

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

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