Sun Microsystems Sun Workstation 100U System Manager's Manual page 331

SEND MAIL
INSTALLATION AND OPERATION GUIDE
Erie Allman
Britton-Lee, Ine.
Version 4.2
Sendmail implements a general purpose internetwork mail routing facility under the UNIX.
operating system. It is not tied to anyone transport protocol - its function may be likened to a
crossbar switch, relaying messages trom one domain into another. In the process, it can do a lim-
ited amount of message header editing to put the message into a format that is appropriate lor
the receiving domain. All of this is done under the control 01 a con8guration 81e.
Due to the requirements of 8exibility for .endmail, the configuration 8le can eeem somewhat
unapproachable. However, there are only a few basic con8gurations for
m~t
sites, for which
standard configuration files have been supplied. Most other configurations can be built by adjust-
ing an existing configuration file incrementally.
Although .endmau is intended to run without the need for monitoring, it has a number of
features that may be used to monitor or adjust the operation under unusual circumstances. These
features are described.
Section one describes how to do a basic .endmtJil installation. Section two explains the
day-to-day inrormation you should know to maintain your mail system. If you have a relatively
normal site, these two sections should contain sulicient information for you to install .endmail
and keep it happy. Section three describes some parameters that may be safely tweaked. Section
four has inrormation regarding the command line arguments. Section 8ve contains the nitty-
gritty information about the configuration file. This section is lor masochists and people who
must write their own configuration file. The appendices give a brief but detailed explanation of a
number of features not described in the rest of the paper.
The rderences in this paper are actually found in the companion paper SendmtJil - An Inter-
network Mail Router. Read that paper before this one to gain a basic understanding of how the
pieces fit together.
1. BASIC INSTALLATION
There are two basic steps to installinl .endmtJiL The hard part is to build the
configuration table. This is a file that .endmtJil reads when it starts up that describes the
mailers it knows about, how to parse addresses, how to rewrite the message header, and the
settings of various options. Although the configuration table is quite complex, a configuration
can usually be built by adjusting an existinl ol-the-shelf con8guration. The second part is
actually doing the installation, i.e., creating the necessary files, etc.
The remainder of this section will describe the installation 01 .entimtJil assuming you can
use one of the existing con8gurations and that the standard installation parameters are accept-
able. All pathnames and examples are given Irom the root 01 the ,endmtJil subtree .
• UNIX is a trademuk of Bell Laborakuia.
Send mall InstallatIon and Operation Gulde
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