Sun Microsystems Sun Workstation 100U System Manager's Manual page 341

Send mall InataDatloD and OperatloD Guide 11
Iroupid to a default (set by the
u
and • options). (This
CaD
be overridden by settinl
the 8 8ag to the mailer for mailen that are trusted and must be called
u
root.) How-
ever, this will cause mail processiDl to
be
aeeounted (usiDl
la(8)) to
root rather than to
the user sendinl the mail.
4.4.1. Tempol'&17 flle mod ..
The mode of all temporary 81es that
,entlmtJiI
creates is determined by the F
option. Reasonable values for this option are 0600 and 0644.
It
the more permissive
mode is selected, it wiD not be nece8laI'J
to run ,entlmail81 root at all (even when rua-
ninl the queue).
4.4.3. Should
my
aIlu databue be writable'
At Sun Microsystema, we have the alias database
(/a,r/li6/
tJliue,-)
mode 666.
There are some dangers inherent iD this approach: any user
CaD
add him-/her-sell to
any list, or can read any other user's mail. However, we have found users to be basi-
cally trustworthy, and the cost of havinl a read-only database peater than the expense
of finding and eradicatinl the rare nasty person.
I. THE WHOLE SCOOP ON THE CONFIGURATION FILE
This section describes the configuration file in detail, includinl hints on how
to
write one
of your own if you have to.
There is one point that should be made clear immediately: the syntax of the
configuration file is designed to be reasonably easy
to pane, since this is done every time
,entl-
mtJil
starts up, rather than easy for a human
to
read or write. On the "future project" list is
a configuration-6le compiler.
An overview of the configuration file is liven 8rst, followed by details of the semantics.
1.1. The Syntax
The configuration file is organized as a series of lines, each of which belins with a sin-
gle character defining the semantics for the rest of the line. Lines beginninl with a space
or a tab are continuation lines (although the semantics are not well defined in many
places). Blank lines and lines beginninl with a sharp symbol
('f')
are comments.
5.1.1. R and S - I'ewrltln. I'ulee
The core or address parsinl are the rewritinl rules. These are an ordered produc-
tion system.
SendmtJil
scans through the set
01
rewritinl rules Iookinl lor a match on
the lert hand side (LHS) or the rule. When a rule matches, the address is replaced by
the right hand side (RHS) of the rule.
There are several sets of rewritinl rules. Some of the rewritinl Bets are used
internally and must have specific semantics. Other rewritinl sets do not have
specifically assigned semantics, and may be referenced by the mailer de8nitions or by
other rewriting sets.
The syntax 01 these two commands are:
Sn
Sets the current ruleset beinl collected
to n. It
you belin a ruleset more than once it
deletes the old definition.
Rlla, rhl comment,
The fields must be separated by at least one tab character; there may be embedded
spaces in the fields. The lla, is a pattern that is applied to the input.
It
it matchea, the
input is rewritten
to
the
rhl.
The
comment,
are ignored.
VemOD
4.1
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