sendmail, 4th Edition

Odds and Ends

Arbitrary text that follows a rule set declaration is ignored unless it appears to be part of the declaration:

S11 100 more rule sets     ← rule set 11
S11100 more rule sets      ← rule set 11100 is illegal
SMyset 100 more rule sets  ← rule set Myset

Although the first and last of these examples work, we recommend that you use the # commenting mechanism instead (available with version 3 and higher configuration files):

S11 #100 more rule sets     ← rule set 11
S11#100 more rule sets      ← rule set 11
SMyset #100 more rule sets  ← rule set Myset

A rule set declaration that has no rules associated with it acts like a do-nothing subroutine (one that returns its workspace unaltered):

Stest1           ← rule set test1 without rules does nothing
Stest2
R $*     $@ $1   ← rule set test2 also returns the workspace unaltered