If the load average is
greater than or equal to our limit, the database map returns a literal FALSE.
The second rule detects a literal FALSE and uses an RHS selection of the $#error delivery
agent to reject the ERTN command.
${load_avg} is transient. If it is defined in the configuration file or in the command line,
that definition can be ignored by sendmail. Note that a $& prefix is necessary when you
reference this macro in rules (that is, use $&{load_avg}, not ${load_avg}).
21.9.63 $L
The unknown local user relay mc configuration
The $L macro is used by the LUSER_RELAY mc configuration macro (?§17.5.6 on page 605)
to store the hostname that will handle local-looking names that are not local. Do not use
this $L macro directly, because it might change in a future release of sendmail.
This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
21.9 Alphabetized sendmail Macros | 833
21.9.64 $m
The DNS domain name V8.1 and later
Under V8 sendmail,* the $m macro is used to store the domain part of the local host??™s fully
qualified name. A fully qualified name begins with the local hostname, followed by a dot
and all the components of the local DNS domain.
When V8 sendmail first starts to run, it calls gethostname(3) to get the name of the local
machine. If that call fails, it sets that local name to be localhost.
Pages:
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468