When you manage email on a cPanel server, you eventually face the classic Exim bottleneck:one misbehaving domain can clog the queue and grind mail delivery to a halt for everyone else. Picture this: a compromised account starts blasting out spam, or a single domain’s messages are all soft-bouncing at Outlook or Yahoo. Suddenly, your […]
Per-Domain Mail Queues in Exim Read Post »
When new accounts are created in cPanel/WHM, the system automatically copies a set of default files from the skeleton directory into the user’s home directory. This mechanism is often overlooked, but with some creativity, it can become a powerful way to automate onboarding, enforce standards, and pre-deploy useful files. Where Is the Skeleton Directory?
Custom Skeleton Directory Tricks for cPanel Read Post »
Update! cPanel supports LetsEncrypt, but you just need to install the plugin for it to work. To do this, run: /scripts/install_lets_encrypt_autossl_provider Once installed, Let’s Encrypt will appear in WHM’s Manage AutoSSL interface (Home >> SSL/TLS >> Manage AutoSSL) where you can enable the provider. At the time of this writing, LetsEncrypt is in public beta
Installing LetsEncrypt SSL Certificates on CentOS + cPanel Servers Read Post »
CPanel allows you to install a shared SSL certificate for email services so your users can connect securely to POP, IMAP, and SMTP. The only real drawback here is that you can only natively use one certificate, which means your users should be connecting to the correct hostname under which the SSL certification is installed from
Configure Email Client Shows Wrong SSL Hostname Read Post »
On recent cPanel versions, rebuilding the Apache conf returns the following non-fatal error: root@savannah [~]# /scripts/rebuildhttpdconf info [rebuildhttpdconf] Missing owner for domain savannah.tcaserversolutions.com, force lookup to root Built /usr/local/apache/conf/httpd.conf OK The error does not adversely effect the way the httpd.conf file is built, but the presence of the unnecessary info message can be annoying.
Fix for “Missing owner for domain X, force lookup to root” Read Post »
There are some situations where you may need to set up multiple shared IP addresses on a server. Some reasons may include grouping accounts per IP or lowering the effect of DDoS attacks if it becomes necessary to block traffic to a specific interface. Whatever the reason, multiple shared IP addresses on a cPanel server
How to Set up Multiple Shared IPs on a cPanel Server Read Post »
Update: This feature is automatically enabled as of cPanel 11.36.1.4 If you have RBL’s enabled globally on your server, there may be times when you want to keep certain domains from having their mail scanned against an RBL. While cPanel supports excluding sender IP addresses from these checks, some manual Exim modifications are needed to
Exclude Domains from RBL Checks for Incoming Email Read Post »
Update: Please be advised that this post does not apply to you if you’re running EasyApache 4, because EA4 uses PHP RPMs and MySQL client compatibility libraries. Please make sure you are following the instructions below that pertain to your system! There’s a dilemma among system administrators of high-traffic servers when it comes to doing
Upgrading MySQL Without Breaking PHP Read Post »
If your server is approaching 99% disk space, your users may be aware of this before you are. At the 1% free margin, the following error will pop up when accessing certain features in cPanel and WHM: Sorry for the inconvience! The filesystem mounted at / on this server is running out of disk space.
Removing WHM Disk Space Errors Read Post »
