Root email notifications not being delivered

Symptoms

The root email notifications are not delivered to the server's admin contact email address.

Description 

The enabled root email notifications at WHM » Contact Manager are not delivered which is typically caused by the root forwarder not being configured and/or the server's hostname and localhost not having an entry within /etc/localdomains. You can verify the issue by running the following command:

exim -bt root

 which will result in the following error if there is an issue:

root@server.hostname.tld is undeliverable: The mail server could not deliver mail to root@server.hostname.tld.  The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.

Workaround

You will want to ensure that the root forwarder is configured at WHM » Edit System Mail Preferences and that the server's hostname and localhost are in the /etc/localdomains file. You can add the server's hostname and localhost to /etc/localdomains using your preferred text editor.

Once the root forwarder has been configured and the hostname and localhost added to /etc/localdomains, you can then run the following command to ensure that the root email notifications will now be delivered:

exim -bt root