Section: User Commands (1)
lock mail folder and execute command
] [-l lock_style
] file command...
(1) command locks file
access, and executes command
. The locking method is
compatible with the Postfix UNIX-style local delivery agent.
- -c config_dir
Read the main.cf configuration file in the named directory
instead of the default configuration directory.
- -l lock_style
Override the locking method specified via the
mailbox_delivery_lock configuration parameter (see below).
Enable verbose logging for debugging purposes. Multiple -v
options make the software increasingly verbose.
A mailbox file. The user should have read/write permission.
The command to execute while file is locked for exclusive
access. The command is executed directly, i.e. without
interpretation by a shell command interpreter.
The result status is 75 (EX_TEMPFAIL) when postlock
could not perform the requested operation. Otherwise, the
exit status is the exit status from the command.
With remote file systems, the ability to acquire a lock does not
necessarily eliminate access conflicts. Avoid file access by
processes running on different machines.
Directory with Postfix configuration files.
Enable verbose logging for debugging purposes.
The following main.cf
parameters are especially relevant to
The text below provides only a parameter summary. See
(5) for more details including examples.
- deliver_lock_attempts (20)
The maximal number of attempts to acquire an exclusive lock on a
mailbox file or bounce(8) logfile.
- deliver_lock_delay (1s)
The time between attempts to acquire an exclusive lock on a mailbox
file or bounce(8) logfile.
- stale_lock_time (500s)
The time after which a stale exclusive mailbox lockfile is removed.
- mailbox_delivery_lock (see 'postconf -d' output)
How to lock a UNIX-style local(8) mailbox before attempting delivery.
RESOURCE AND RATE CONTROLS
- fork_attempts (5)
The maximal number of attempts to fork() a child process.
- fork_delay (1s)
The delay between attempts to fork() a child process.
- config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and master.cf
- import_environment (see 'postconf -d' output)
The list of environment parameters that a privileged Postfix
process will import from a non-Postfix parent process, or name=value
postconf(5), configuration parameters
The Secure Mailer license must be distributed with this software.
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
111 8th Avenue
New York, NY 10011, USA