4.2.6 on page 414 MaxRecipientsPerMessage Maximum recipients per
envelope
Runners= (R=) ?§11.4.2.7 on page 414 MaxRunnersPerQueue Maximum queue processors
per queue group
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11.4 Queue Groups (V8.12 and Later) | 411
11.4.2.1 The Flags= (F=) queue-group equate
The F= queue-group equate is used to set flags for the queue group. Currently there is
only one flag, the f flag, which tells sendmail to fork multiple times to process the
queue group in parallel (the exact opposite of the -qf command-line switch, which
tells sendmail to not fork multiple times, but instead to run the queues serially in the
foreground).
When this F= flag is specified, sendmail forks one queue processor for eachqueue
directory in the group. But note that the sendmail program will fork only up to the
total number of parallel processors set by the R= queue-group equate. If that limit is
fewer than the number of queues, the remaining queues are handled during the next
queue run, in round-robin fashion.
When the fast processing of a queue group is required, we recommend you specify
this F=f queue group flag. If speed is not of concern, you can reduce the system
impact by omitting this flag. But if you omit it and then specify multiple runners with
the R= queue-group equate, the following message will print and be logged:
Warning: Q=queuegroup name: R=number: multiple queue runners specified
but flag 'f?? is not set
As a performance compromise, some parallelism can be attained and system impact
reduced by setting this flag and limiting the number of runners specified with the R=
queue-group equate.
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