sendmail, 4th Edition

Macros with mc Configuration

The various FEATURE( )s of the mc configuration technique primarily use uppercase, single-character macro names. The complete list of them is shown in Table 21-5. Some of these are defined by using the appropriate mc configuration command (as you’ll see later). Others are predefined for you by the mc configuration technique. See the appropriate section reference for a full description of how to use each macro.

Table 21-5. Macros reserved with the mc configuration technique

Macro	§	Description
$B	$B on page 808	The BITNET relay
$C	$C on page 817	The DECnet relay
$D	$D on page 823	The local domain (unused)
$E	$E on page 824	The X.400 relay (reserved for future use)
$F	$F on page 824	The fax relay
$H	$H on page 826	The mail hub
$L	$L on page 832	The unknown local user relay
$M	$M on page 835	Whom we are masquerading as
$R	$R on page 843	The relay for unqualified names (deprecated)
$S	$S on page 845	The smart host
$U	$U on page 848	The UUCP name to override $k
$V	$V on page 850	The UUCP relay for class $=V
$W	$W on page 851	The UUCP relay for class $=W
$X	$X on page 852	The UUCP relay for class $=X
$Y	$Y on page 852	The UUCP relay for unclassified hosts
$Z	$Z on page 853	The version of this mc configuration

A few macros can be defined by using an mc configuration command. For example, here is how you define the BITNET relay with the BITNET_RELAY keyword:

define(`BITNET_RELAY', `host.domain')

See Table 21-6