Chapter 3. Tune sendmail with Compile-Time Macros
For most users, the default
sendmail that is
produced by running
Build is perfectly suitable.
For others, however, support for certain desirable
features—such as hesiod, LDAP, or NIS—will have to be
added. The open source distribution of
has many such support items that you can include or exclude from your
compiled binary using compile-time macros.
What’s New with V8.13
V8.13 has introduced six new compile-time macros:
SOCKETMAPcompile-time macro enables use of the new
socketdatabase-map type (Section 3.1.1 [V8.13]).
SM_CONF_LDAP_INITIALIZEcompile-time macro (Section 3.1.2 [V8.13]) if set, declares that the
ldap_initialize(3) routine exists in your LDAP library.
NEEDINTERRNOcompile-time macro, if set, says that
errnois not declared in your system’s
SM_CONF_POLLcompile-time macro causes
poll(2) to be used instead of
select(2) in the Milter library.
HASCLOSEFROMcompile-time macro may be defined if your system has the
closefrom(3) C-library function.
HASFDWALKcompile-time macro may be defined if your system has the
fdwalk(3) C-library function.
The SOCKETMAP Compile-Time Macro
SOCKETMAP compile-time macro
use of the new
socket database-map type (Section 23.1.5
SOCKETMAP inside your Build
m4 file with a line like this:
If you use a vendor supplied
sendmail program, you may check to see whether it ...