S configuration command declares the start of
a rule set. It is perhaps the simplest of all configuration commands
and looks like this:
S, like all configuration commands, must begin
the line. The
ident identifies the rule
set. There can be whitespace between the
S and the
ident. If the
ident is missing,
sendmail prints the following error message and
skips that particular rule-set declaration:
configfile: line num: invalid ruleset name: ""
Prior to V8.7 sendmail the
ident could only be numeric. Beginning
with V8.7 sendmail the
ident can be numeric or alphanumeric. We
cover the old form first, then the new.
Prior to V8.7 sendmail, rule sets could be identified only by numbers. When a rule set is declared with an integer, that integer is taken to be the numeric identity of the rule set:
# is an integer such as 23. If the
# is greater than 100 (the maximum
number of numbered rule sets allowed), or is negative,
sendmail prints and logs the following error:
configfile: line number: bad ruleset # ( maximum max)
and each rule following that bad rule-set declaration will produce the following error:
configfile: line number: missing valid ruleset for "Rrule shown here"
Beginning with V8.7 sendmail, rule sets can be declared with numbers (as in the previous section) or with more meaningful names. The form for a rule-set name declaration looks like this:
The name can contain only ASCII alphanumeric characters ...