Webmail Server Nodes

A webmail server node is a Linux server that provides webmail services with the Horde and Roundcube software. When a customer creates a mailbox, the system registers it in the preferred webmail software (defined by the service template) on the node.

By default, if there is no webmail server node in the system, the webmail services are provided by the management node. Adding the webmail node to your environment allows you to decrease the load on the management node.

1. A webmail server does not require a license key.
2. There can be only one webmail server node in the system.
3. After you add a webmail server node, already existing webmail accounts will be transferred to that node. Note that specific webmail content of these accounts (calendar items, custom skins, and so on) will not be transferred.

When you assign the webmail server role to a node, the system automatically installs the following components to that node: Apache, Horde, and Roundcube.

Server Requirements

Before adding a webmail server node, make sure that the server meets the following requirements.


RHEL 5.9, 6.4 (32-bit or 64-bit)

CentOS 5.9, 6.4 (32-bit or 64-bit)

CloudLinux 6 (32-bit or 64-bit)


2 GHz minimum, 3.2 GHz recommended


1 GB minimum

Disk space

At least 10 GB free

Open TCP ports

Communication between a service node and PA panels: TCP ports 8352-8999

Communication through SSH: TCP port 22

Access to webmail: TCP port 80

Important: You must disable SELinux on a service node before adding it to the environment. Enabling SELinux after deployment will result in your PPA installation malfunctioning. To learn how to disable SELinux, please refer to the manuals provided for the OS installed on the node.

Adding a Node

To register a webmail server node in PA:

  1. Add a mail server node to PA by starting the Add New Node wizard in Administration Panel > Infrastructure > Service Nodes. The wizard will ask you to provide the following information:
  2. Normally, when the installation is complete, the node is marked as Ready to provide its services. If this does not happen, resolve the issue and mark it manually on the node properties page (Infrastructure > Service Nodes).
Automatically Assigned Attributes

As there can be only one webmail server node in the system, PPA does not assign any attributes to it.


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