This chapter presents important information you need to consider before installing the Messaging Server:
We recommend that you consider the following factors before installing the Messaging Server. Doing so will allow you to administer the Messaging Server more efficiently and better accommodate the changing needs of your system.
fresh installation | We recommend installing the Messaging Server on a clean, freshly-installed system that is dedicated for mail server use. | |
number of mail clients | ||
Estimate the number of mail clients your system must service for a reasonable period of time into the future. This will help you determining licensing and system hardware needs. | ||
Volution Manager and Volution Online | ||
The Volution platform includes powerful system management and administration products that can be used effectively with the Messaging Server. For more information on planning an installation with these products, see "Using Volution System Management Services" in Chapter 2 of the Administrator's Guide for more information | ||
local or remote LDAP server | ||
Determine whether the LDAP server component of the Messaging Server will be located on the same host system as other Messaging Server components or on a different system. For example, you might locate the LDAP server on a different system if you manage the Messaging Server system with Volution Manager, which is also LDAP-based. LDAP is the only Messaging Server component that can be located on a remote system. See "Configuring a Remote OpenLDAP Server" in Chapter 7 of the Administrator's Guide for more information
| ||
component file locations | ||
Messaging Server components are installed in default locations. They can be moved, but doing so after the Messaging Server is serving mail will cause a disruption in mail services. See "Managing Messaging Server Components" in the Administrator's Guide for more information. | ||
local user accounts | Caldera OpenLinux installation provides the opportunity to create user accounts. However, mail to these users can only be received at their Linux mailboxes and cannot be accessed using IMAP or POP servers. If you want these users to receive mail through the Messaging Server, you must either remove the users or create separate Messaging Server mail accounts for them with different user IDs. During installation of the system on which you will run the Messaging Server, we recommend that you not create accounts for any user for whom you intend a Messaging Server account.
|
Platform: | Caldera OpenLinux Server 3.1 or Open UNIX 8 Release 8.0 with Linux Kernel Personality |
RAM: | minimum 64Mb system + 1Mb per user, 512Mb recommended (in addition to platform requirements) |
Disk space: | minimum 40Mb system + appropriate mailbox allocation per user (in addition to platform requirements) |
Networking: | TCP/IP networking with DNS name resolution configured |
Installation profile: | OpenLinux: webserver |
LKP: Web Server | |
Language support: | English only in this release |
Your designated Messaging Server system must also satisfy basic system requirements. In particular:
Caldera OpenLinux 3.1 includes the 2.4 kernel compiled to support up to 64GB of RAM. As a result, the kernel and Caldera OpenLinux (and hence the Messaging Server) will only function on systems that support the PAE (Physical Address Extensions) standard. Such CPUs include the following:
Intel Celeron | Intel Pentium II | Intel Pentium 4 | AMD Duron |
Intel Pentium Pro | Intel Pentium III | AMD Athlon | AMD Thunderbird |
Although Open UNIX 8 runs on the following CPUs, Caldera OpenLinux does not run on them or on anything earlier:
Intel Pentium | Intel Pentium MMX | AMD K6 and K6 2 |
For more information, see the Caldera OpenLinux 3.1 Installation Guide and the Open UNIX 8 Getting Started Guide.
Do not attempt to install the Messaging Server on a system with an MS Windows operating system already installed. The installation will fail in unpredictable ways. The autorun.inf facility is included on the media distribution only for the purpose of displaying release documentation.
To ensure that RPM packages required by the Messaging Server are already on your system, select the webserver installation profile (or All Packages). Other profiles do not contain the full set of RPM packages required by the Messaging Server. This is required for both native and LKP installations.
The following RPM packages are required by the Messaging Server and should not be removed from your system:
apache apache-devel apache-doc libpam libpam-devel openldap openldap-devel openssl openssl-devel openssl-devel-static pam_ldap perl-modules php php-doc
Warning |
The Messaging Server reconfigures these packages. Do not recompile or update them except as documented for product upgrades; doing so might disable the Messaging Server. |
We recommend that you use one of the following browsers for both administrative and client use:
Internet Explorer Version 5 or greater
Netscape Communicator 6 or greater
The Messaging Server installs on Caldera OpenLinux Server 3.1:
natively
under Linux Kernel Personality (LKP) for Open UNIX 8
Messaging Server operation and performance are equivalent on these platforms with comparable hardware and networking.
In addition to conventional installation on a local system, the Messaging Server can be installed using Volution Manager, provided that a Volution Manager Client is installed on the target system.
Volution Manager Server Release 1.1 can be installed on a system with the Messaging Server, although the Manager Server must be installed first. The Messaging Server cannot be used with Volution Manager Server Release 1.0.
The Messaging Server adds the following RPM packages to your system:
volutionmsg | Messaging Server framework |
volutionmsg-doc | Messaging Server documentation |
cyrus-imapd | Cyrus IMAP server |
cyrus-sasl | Cyrus SASL (Simple Authentication and Security Layer) |
db3 | Berkeley DB programmatic toolkit |
db3-devel | Berkeley DB header files, libraries, and documentation |
gq | GQ graphical browser for LDAP |
perl-Convert-ASN | ASN.1 Encode/Decode library for perl |
perl-IMAP-Admin | IMAP-Admin module for perl |
perl-ldap | perl interface modules for LDAP servers |
postfix | Postfix Mail Transport Agent (MTA) |
Messaging Server components install by default on a single system. If you want to configure the Messaging Server to use a remote LDAP server, see "Advanced OpenLDAP Configuration" in the Administrator's Guide.
Warning |
The open source software packages listed here have been adapted for use on a Messaging Server system. They should only be updated by Messaging Server releases. Installing them from other sources, including non-Messaging Server OpenLinux distributions, might disable the Messaging Server. |
The Messaging Server removes the following components from your system during installation:
Warning |
Reinstalling any of these packages or installing new versions of them from other distributions will disable the Messaging Server. |
The Messaging Server installation on Open UNIX 8 sets the following kernel tunable parameters for the components specified:
Note: The installation log records this tuning activity as errors; these errors can be safely ignored.
Additional kernel tuning might be required on your Open UNIX 8 system. For more information, see the Open UNIX 8 Getting Started Guide and the Messaging Server Late News.
The basic steps to install and configure the Messaging Server are:
Plan your Messaging Server deployment and review the "System Requirements" discussed in this chapter.
Install the base platform, the web server profile of either Caldera OpenLinux or Open UNIX 8, as described in your platform documentation.
If desired on Caldera OpenLinux, install Volution Manager Server before installing the Messaging Server.
Install the Messaging Server as described in "Chapter 3. Installation and removal".
Point your web browser at http://hostname/msg to access the Server Manager interface, as described in "Chapter 4. Administering the Messaging Server".
Log in to the Server Manager as admin with the password admin and change the password for this administrative account, as described in "Chapter 4. Administering the Messaging Server".
Use the Server Manager to configure and administer your Messaging Server mail system, adding user accounts, aliases, and domain arrangements as desired, as described in "Chapter 4. Administering the Messaging Server".
Configure users' mail client software by instructing them to connect to http://hostname/msg from their desktop computers using personal user accounts and passwords, as described in "Chapter 5. Administering Mail Client Users".
Consult the remainder of this document and the Administrator's Guide for more detailed instructions.