Unoverica Message Transport offers SMTP mail services as well as support for POP3 electronic mail clients such as Eudora and Netscape Communicator. However, you do not need to use the POP3 services if you already have another POP3 server on another system, or if you use a proprietary mail product such as Novell’s GroupWise or Lotus’ cc:Mail.
In this case, you may choose to only use Unoverica Message Transport’s SMTP services to relay mail between your existing mail system and the Internet, as illustrated in Figure 1.6 below.
Figure 1.6: Local users access proprietary mail system, while Unoverica Message Transport is only used to relay SMTP mail between the local mail system and the Internet.
The minimum memory required for the SMTP client and server relay components to run effectively is approximately 4 megabytes of RAM. If you will be processing heavy amounts of mail, or if you will be processing mail for multiple servers or domains then you may wish to double or even triple this minimum amount.
In addition, you will need to reserve approximately 10 megabytes of disk space for the mail system executables, databases, and temporary files. If you will be transferring large amounts of mail over a slow connection, then you may wish to increase this amount by as much as 100 megabytes, depending on the SMTP traffic level.
Since no POP3 users will be defined, you will not be storing mail for these users. Therefore, you do not need to aside any additional disk space for POP3 users.
NOTE: These requirements are above and beyond the minimum requirements for NetWare and any services also running on the same server that is also hosting Unoverica Message Transport.
WARNING: If the NetWare server you wish to use for Unoverica Message Transport does not meet the minimum system requirements specified in this chapter, you will encounter problems during the installation or operation of Unoverica Message Transport. These problems may be minor annoyances, a lack of expected functionality (such as mail messages not getting delivered successfully), or total system failure resulting in lost data.
STEP: To continue to the next step in the verification process, go to section 1.3.5 Per-User Disk Space Requirements.
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