Name
$H
Synopsis
The m4 nullclient feature (FEATURE(nullclient)) causes all mail to be sent to a central hub machine for handling. Part of what it does is to define the mc macro MAIL_HUB:
define(`MAIL_HUB', `hub')dnlThis also causes $H to be defined as
hub. If MAIL_HUB has a value, and if
LOCAL_RELAY ($R) does not, all local email
is forwarded to hub. If LOCAL_RELAY is
defined, it takes precedence over MAIL_HUB for some mail. See Section 4.5.7 for a description of MAIL_HUB and how it
interacts with LOCAL_RELAY.
You should never use this macro directly because it might change in a future release of sendmail. Use the MAIL_HUB mc configuration macro instead.
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