(BSDI) Unix version 3.
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11.4 Queue Groups (V8.12 and Later) | 409
You can best tune queue groups by first understanding their limitations. We cover
these topics in this section, but first we need to briefly discuss the default queue
group.
11.4.1 The Default Queue Group
Prior to V8.12 sendmail, there were no queue groups. Instead, every -q command
and every queue option (suchas QueueDirectory) applied to all the queue directories
you had.*
Beginning withV8.12, sendmail offers a way to define multiple queue directories and
a way to group them by function or specialty. For compatibility with old versions, a
special queue group named mqueue is the default queue group. It takes on all the
properties of every -q command, and every queue option, just like before.
When you later declare particular queue groups (as we show in the next section),
those additional groups take all their properties from the default group, unless you
override a particular property with a specific equate. Those equates and the command-
line arguments or options they override are shown in Table 11-2 on page 410.
For example, the following declares two different queue directories:
define(`QUEUE_DIR??, `/var/spool/mqueue??)
QUEUE_GROUP(`regularmail??, `??)
QUEUE_GROUP(`slowmail??, `P=/var/spool/mqueue/slowqueue??)
The first line declares the queue used by the default group (always known as mqueue).
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