This chapter provides the information specific to the hardware and software requirements for installing SunTM Internet Mail ServerTM 4.0.

Topics in this chapter include:

Platform requirements

CPU requirements

Disk space requirements

Swap space requirements

Memory requirements

Client system configuration requirements

Sun Directory Services 3.1 requirements

Platform Requirements

The SIMS software is available on SPARCTM and Intel-based systems running the operating system versions indicated in TABLE 2-1.

TABLE  2-1   Supported Platforms and Operating System Environments

Platform	Operating System
SPARCstation 20 or higher	SunTM SolarisTM SPARC 2.6 and 2.7
Intel Pentium 200 MHz-based systems	Sun Solaris Intel 2.6 and 2.7

CPU Requirements

Although the SIMS software can operate on any mail server with a single CPU, your mail server should be equipped with multiple CPUs to take advantage of the multithreaded capabilities of the product and for improved performance.

Disk Space Requirements

This section lists the disk space requirements for SIMS 4.0 core components. On the designated mail server, make sure that you allocate adequate free space on the file system that contains the directories listed in TABLE 2-2. This table does not account for Netscape Directory Services, Sun Web Access, or SDK. Use the df command to check the free disk space.

TABLE  2-2   SIMS 4.0 Storage Requirements

Directory Path	SIMS Core Requirement
/opt	90 MB
/var	20 MB
/usr	10.5 MB

Swap Space Requirements

Although the minimum recommendation swap space is 128 megabytes, better performance can be achieved on systems with more swap space such as 192 megabytes. The recommended swap space is 2.5 times the physical memory in the computer. The amount of swap space varies depending on the swap space needed for running other software on the server.

Memory Requirements

The minimum required RAM is 64 megabytes. TABLE 2-3 below lists the memory requirements for IMAP- and POP3-based systems.

TABLE  2-3   Memory Requirements for IMAP and POP3 Systems

Number of Users	Physical Memory for IMAP4	Physical Memory for POP3
100	178 MB	165 MB
500	375 MB	320 MB
1,000	622 MB	492 MB
5,000	2.6 GB	2.0 GB

Client Requirements

TABLE 2-4

TABLE  2-4   Client Requirements

Client	Requirement
Sun Web Access	HTML v3.2 compliant GUI Web browser which supports HTML frames and cookies
MAPI Providers	Microsoft Windows Messaging inbox, Microsoft Outlook 97

shows the clients that are supported by SIMS 4.0.

See Chapter 5, "SIMS Architecture" in the Sun Internet Mail Server 4.0 Concepts Guide for descriptions of supported clients that you could use with SIMS.  

Sun Directory Services 3.1 Requirements

Sun Directory Services 3.1 requires the following system configurations:

Solaris 2.6 for SPARC or Solaris 2.6 for x86/Pentium® platforms

CD-ROM drive for software installation.

64 MB disk space and 64 MB memory.

An X Window System window manager is required to use the graphical configuration and management tools.