Code Blue TOOLVOX X3 - Manual (Page 120)

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ToolVox® X3
Administrator Guide
Max number of Postfix child processes
This option limits the number of child processes that Postfix will spawn. On high load servers, the
default may be too low and need to be raised to as much as 500 or more. For most environments,
50 is more than adequate and may even be overkill. For example, on dial-up or consumer
broadband serving one to 10 users, a more appropriate limit might be 10. If in doubt, leave its
default unless it causes problems. This option correlates to the default_process_limit directive and
defaults to 50.
Max number of addresses remembered by the duplicate filter
While expanding aliases and .forward files, Postfix will remember addresses that are being delivered
to and attempt to prevent duplicate deliveries to the same address. This option limits the number of
recipient addresses that will be remembered. It corresponds to the duplicate_filter_limit directive and
defaults to 1000. There is no compelling reason to increase this value.
Max attempts to acquire file lock
This option limits the number of attempts Postfix will make when attempting to obtain an exclusive
lock on a mailbox or other file requiring exclusive access. It corresponds to the deliver_lock_
attempts directive and defaults to 20.
Time in seconds between file lock attempts
Postfix will wait a specified time between attempts to lock a given file after a failed lock attempt. This
option configures the deliver_lock_delay directive and defaults to 1 second.
Max attempts to fork a process
If Postfix attempts to fork a new process and fails, due to errors or a lack of available resources, it
will try again a specified number of times. This option correlates to the fork_attempts directive and
defaults to 5.
Time in seconds between fork attempts
Postfix will try to spawn a new process a specified time after a failed attempt. This option correlates
to the fork_delay directive and defaults to 1 second.
Max memory used for processing headers
This option limits the amount of memory in bytes that Postfix will use to process message headers.
If a message header is too large to fit into the memory specified, the headers will be treated as
part of the message body. This option correlates to the header_size_limit directive and defaults to
102,400.
Max memory used for handling input lines
This option limits the amount of memory in bytes that Postfix will use to handle input lines. An input
line is any line read from an :include: or .forward file. In order to prevent the mail server from using
excessive amounts of memory, it will break up files into chunks of this length. This option correlates
to the line_length_limit directive and defaults to 2048.