Hi,
Make sure you have enabled the service monitoring for antirelayd under Services Manager in WHM. If not, enable it & restart the exim service. If still the problem persists, then run the following scripts from SSH as a root user:
/scripts/eximup --force
/scripts/fixrelayd
Or you may need to submit a support ticket with login details of your server/
VPS Hosting. We'll get it 100% fixed for you
