$S
The smart host mc configuration
Using the mc configuration
method, the $S
macro stores the host name defined by SMART_HOST
(SMART_HOST mc macro
on page 597). The smart host is the name of the host
that can deliver all mail that the local host
cannot. $S is
most often used with UUCP sites to get DNS mail to
the outside world. Do not use this $S macro directly, as it
might change without notice in a future version of
sendmail. Instead, define
this value using the mc
SMART_HOST configuration macro.
Get sendmail, 4th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
