In this section we present each compile-time macro (or group of them)
in alphabetical order. There are so many to choose from that you will
probably be better off first scanning Table 3-2
for any that seem interesting, then going to that particular section
for a more detailed look.
As you learn more about sendmail you might find
that a particular option or feature might require that one or more of
these compile-time macros be turned on or off. You are encouraged to
return to this reference section to study each such compile-time
macro before redefining it and rebuilding
sendmail.
