Bounced Message “retry time not reached for any host after a long failure period” in WHM/cPanel

If you receive complaints from people sending mail to you with the following error “retry time not reached for any host after a long failure period”, it is likely due to an error with the server sending mail at their end. The Exim Retry Database has likely become corrupt and would need to be fixed[…]

How to change maximum email size in cPanel/WHM

How to change maximum email size in cPanel/WHM There is no max file size limit that can be sent and received, however, cPanel defaults the limit to 50mb. You can change this in cPanel. To change this do the following, Login to cPanel as admin Under Service Configuration, Click “exim Configuration Manager” Click “Advanced Editor”[…]

How to Set a Firewall on cPanel & WHM’s Services

CSF (ConfigServer Security & Firewall) ConfigServer provides the free WHM plugin CSF, which allows you to modify your iptables rules within WHM. It is a stateful packet inspection (SPI) firewall, login and intrusion detection mechanism, and general security application for Linux servers. Important: We do not recommend that you use these examples. Instead, make certain[…]

Restart “spamd” in WHM via SSH

I was facing the issue to restart “spamd”. The error messages was “The system’s command to check or to restart this service failed.” To Fix this issue. Please follow below: Via root SSH access: Please use the following to check if spamd is running: /scripts/restartsrv_spamd –status To restart spamd, the following command may be used:[…]

How To Update the Kernel in CentOS / Red Hat using YUM

Updating the kernel on Red Hat Linux or CentOS Linux is a very simple process. Most commonly you will use the following command in the case of a security vulnerability, or perhaps just to verify that you’re running the most up-to-date kernel: yum -y update kernel In this case, yum is the rpm-based package manager[…]