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.

Apache, Mysql, PHP, Vernish, Webmin on Debian-Ubuntu

Most of all servers come with installed apache,php and mysql but but without vernish and webmin we need to install this soft manually on Debian or ubuntu.

We will start to upgrade out system:

apt-get update
apt-get dist-upgrade

Now if apache is not installed we should install it:

apt-get install apache2

install mysql server:

apt-get install mysql-server

install PHP:

apt-get install php5 php-pear php5-mysql php5-common php5-mcrypt php5-curl php5-cli php5-gd php5-dev

install curl(is needed for vernish) and unzip(if not installed):

apt-get install curl unzip

Now we must install dependencies for webmin control panel:

apt-get install perl libnet-ssleay-perl openssl libauthen-pam-perl libpam-runtime libio-pty-perl apt-show-versions python

Wget webmin and install it:

dpkg –install webmin_1.660_all.deb

at least install vernish:

curl | apt-key add –
echo “deb wheezy varnish-3.0” >> /etc/apt/sources.list
apt-get update
apt-get install varnish

Now all software installed you can access your webmin control panel using https://yourip:10000

Install Nginx, PHP, Mysql – Debian

Nginix is great web server it’s much faster then apache server, but we need to make some tasks to install and configure Nginix with PHP.

1) Install mysql server and other tools which we need

apt-get install gcc libpcre3 libpcre3-dev zlib1g zlib1g-dev libssl-dev openssl libxml2-dev libevent-dev mysql-client mysql-server

2) Normally debian already includes Nginix

apt-get update

apt-get install nginx

3) Now we can install PHP and extensions

apt-get update

apt-get install php5 php5-fpm php-pear php5-common php5-mcrypt php5-mysql php5-curl php5-cli php5-gd php5-dev

4) Start all services

service nginx start

service php5-fpm start

service mysql start

5) Start php,mysql,nginx at start

update-rc.d nginx default

update-rc.d mysql defaults

update-rc.d php5-fpm defaults

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