Can’t receive emails WHM/Cpanel – Sender Verification Callouts

When you understood that many email are not delivered in your inbox which are sent from (Hotmail,Google or custom server) first of all you must check logs whats happening, if dns is configured properly and you see “Could not complete sender verify callout” in your logs which you can check in whm “Email”->” Mail Delivery Reports ” then this is because of Sender Verification Callouts

Use callouts to verify the existence of email senders. Exim will connect to the mail exchanger for a given address to verify it exists before accepting mail from it.

we can fix it very fast just go to “Exim Configuration Manager” in WHM and search for “Sender Verification Callout” check off which by the way is default, click save and test your mails.

Setup NSF backup WHM/CPanel

This is tutorial how to enable NFS backup for WHM running on CENTOS 6

first of all we need to install NSF soft on centos use this commands to do this

yum install nfs-utils nfs-utils-lib

also install Portmap if it’s not installed

yum install rpcbind

Now we must start services

chkconfig nfs on 
service rpcbind start
service nfs start

Okay now everything is installed and we must create directory and mount NFS

mkdir /home/nfsdir
mount -t nfs /home/nfsdir

Now just go to Backup Configuration in whm and set Default Backup Directory to in our situation /home/nfsdir, that’s all now backup will be saved in NFS which is mounted in your system.

Install nginx + varnish + apache in Cpanel/WHM

By default Cpanel comes with apache only, if you need to install Nginx,Varnish to make faster service you can use several plugins, I will start with free one and then tell about shareware.


Plugin comes with already configured Nginx and Varnish, to install and use terminal

tar -zxf apachebooster.tar.gz
cd apachebooster
bash  or sh

after installation you will see apachebooster in WHM plugins

You can configure Varnish and Nginx from here, and also purge varnish cache if needed. I think this plugin have have all what is needed but if your searching for more you can buy Cpanel plugin from Unixy, I think they have same functions but anyway it up to you which one to choose.

There was a problem creating the parked domain – Cpanel

There was a problem creating the parked domain. Show Details

Error from park wrapper: Using nameservers with the following IPs:, Sorry, the domain is already pointed to an IP address that does not appear to use DNS servers associated with this server. Please transfer the domain to this servers nameservers or have your administrator add one of its nameservers to /etc/ips.remotedns and make the proper A entries on that remote nameserver.


If you have access to WHM you must make this change –

WHM > Tweak Settings > Domains > Allow Remote Domains > On