Unoverica Message Transport v2.11 Appendix F: Options, Macros, Classes, Headers, Mailers and Rules

Appendix F: Options, Macros, Classes, Headers, Mailers and Rules

F.3.1 System-defined Macros

Some macros are built by the system automatically when Unoverica Message Transport is first loaded, or while an e-mail message is being processed by Unoverica Message Transport. These macros include things like the system’s date, the version of SENDMAIL in use, the message sender’s e-mail address, etcetera. Some of these macros can be redefined by the system administrator, and some of them cannot. Figure F.10 below lists some of the system-defined macros, their purpose, and whether or not they can be redefined.

Macro	Description	Read-Only?
$_	local user and hostname	yes
$a	origin date of a message	yes
$b	local system time	yes
$d	local system time in UNIX form	yes
$e	SMTP greeting message	no
$g	message sender’s e-mail address	yes
$i	message identifier within a queue	yes
$l	"From" header format	no
$j	fully-qualified hostname	no
$k	UUCP hostname	yes
$m	local system’s DNS domain name	no
$n	Name of error message sender	no
$o	Token separation characters	no
$q	message sender’s full address	yes
$s	sender’s hostname	yes
$t	current time in seconds	yes
$v	SENDMAIL’s version number	yes
$w	local system’s hostname	no
$x	message sender’s full name	yes

Figure F.10: System-defined macros.

The macros marked as read-only in Figure F.10 can not be modified by you. The macros marked as read-write can be modified as required.

WARNING: Making changes to the Unoverica Message Transport system may cause the mail system to function improperly, resulting in lost or corrupted mail messages. Unoverica Corporation will not be liable for any problems resulting from the unauthorized use of these advanced configuration options.